LOANS AND LOANS HELD-FOR-SALE - Schedule of Troubled Debt Restructurings (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) contract	Sep. 30, 2024 USD ($) contract	Sep. 30, 2025 USD ($) contract	Sep. 30, 2024 USD ($) contract	Dec. 31, 2024 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	3	12	15
Amortized Cost Basis	$ 0	$ 15,710,000	$ 234,641,000	$ 297,049,000
% of Total Class of Financing Receivable	0.00%	4.91%	6.12%	93.75%
Portfolio Loans	$ 3,835,653,000		$ 3,835,653,000		$ 3,624,826,000
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	3,573,375,000		3,573,375,000		3,360,649,000
30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	3,042,000		3,042,000		4,680,000
90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0		0		0
Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0	$ 0	$ 434,000
% of Total Class of Financing Receivable		0.00%	0.00%	0.02%
Portfolio Loans	2,063,181,000		$ 2,063,181,000		1,869,831,000
Commercial Real Estate \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	2,038,525,000		2,038,525,000		1,866,013,000
Commercial Real Estate \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	532,000		532,000		2,642,000
Commercial and Industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 13,604,000	$ 966,000	$ 13,604,000
% of Total Class of Financing Receivable		5.63%	0.44%	5.63%
Portfolio Loans	218,038,000		$ 218,038,000		230,483,000
Commercial and Industrial \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	216,793,000		216,793,000		229,225,000
Commercial and Industrial \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	99,000		99,000		180,000
Residential Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 2,106,000	$ 0	$ 2,106,000
% of Total Class of Financing Receivable		0.27%	0.00%	0.27%
Portfolio Loans	826,944,000		$ 826,944,000		777,471,000
Residential Mortgages \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	819,860,000		819,860,000		771,689,000
Residential Mortgages \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	2,212,000		2,212,000		867,000
Other Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0	$ 0	$ 0
% of Total Class of Financing Receivable		0.00%	0.00%	0.00%
Portfolio Loans	29,077,000		$ 29,077,000		28,908,000
Other Consumer \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	28,820,000		28,820,000		28,582,000
Other Consumer \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	158,000		158,000		208,000
Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0	$ 5,121,000	$ 0
% of Total Class of Financing Receivable		0.00%	1.10%	0.00%
Portfolio Loans	466,701,000		$ 466,701,000		462,930,000
Construction \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	466,219,000		466,219,000		461,919,000
Construction \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	41,000		41,000		783,000
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized Cost Basis		$ 0	$ 228,554,000	$ 280,905,000
% of Total Class of Financing Receivable		0.00%	98.64%	98.86%
Portfolio Loans	231,712,000		$ 231,712,000		255,203,000
Other \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	3,158,000		3,158,000		3,221,000
Other \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0		0		$ 0
Accruing and Nonaccruing Restructured Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	234,641,000	$ 297,049,000	234,641,000	$ 297,049,000
Accruing and Nonaccruing Restructured Loans \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	234,641,000	297,049,000	234,641,000	297,049,000
Accruing and Nonaccruing Restructured Loans \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing and Nonaccruing Restructured Loans \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	2	1	2
Amortized Cost Basis	$ 0	$ 13,604,000	$ 5,121,000	$ 13,604,000
% of Total Class of Financing Receivable	0.00%	5.63%	0.13%	5.63%
Portfolio Loans	$ 5,121,000	$ 13,604,000	$ 5,121,000	$ 13,604,000
Accruing Restructured Loans \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	5,121,000	13,604,000	5,121,000	13,604,000
Accruing Restructured Loans \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	0
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Commercial Real Estate \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Commercial Real Estate \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Commercial Real Estate \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Commercial and Industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	2	0	2
Amortized Cost Basis	$ 0	$ 13,604,000	$ 0	$ 13,604,000
% of Total Class of Financing Receivable	0.00%	5.63%	0.00%	5.63%
Portfolio Loans	$ 0	$ 13,604,000	$ 0	$ 13,604,000
Accruing Restructured Loans \| Commercial and Industrial \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	13,604,000	0	13,604,000
Accruing Restructured Loans \| Commercial and Industrial \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Commercial and Industrial \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Residential Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	0
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Residential Mortgages \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Residential Mortgages \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Residential Mortgages \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Other Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	0
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Other Consumer \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Other Consumer \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Other Consumer \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	1	0
Amortized Cost Basis	$ 0	$ 0	$ 5,121,000	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	1.10%	0.00%
Portfolio Loans	$ 5,121,000	$ 0	$ 5,121,000	$ 0
Accruing Restructured Loans \| Construction \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	5,121,000	0	5,121,000	0
Accruing Restructured Loans \| Construction \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Construction \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	0
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Accruing Restructured Loans \| Other \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Other \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Accruing Restructured Loans \| Other \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	1	11	13
Amortized Cost Basis	$ 0	$ 2,106,000	$ 229,520,000	$ 283,445,000
% of Total Class of Financing Receivable	0.00%	0.27%	5.98%	97.98%
Portfolio Loans	$ 229,520,000	$ 283,445,000	$ 229,520,000	$ 283,445,000
Nonaccrual Restructured Loans \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	229,520,000	283,445,000	229,520,000	283,445,000
Nonaccrual Restructured Loans \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Commercial Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	1
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 434,000
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.02%
Portfolio Loans	$ 0	$ 434,000	$ 0	$ 434,000
Nonaccrual Restructured Loans \| Commercial Real Estate \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	434,000	0	434,000
Nonaccrual Restructured Loans \| Commercial Real Estate \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Commercial Real Estate \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Commercial and Industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	2	0
Amortized Cost Basis	$ 0	$ 0	$ 966,000	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.44%	0.00%
Portfolio Loans	$ 966,000	$ 0	$ 966,000	$ 0
Nonaccrual Restructured Loans \| Commercial and Industrial \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	966,000	0	966,000	0
Nonaccrual Restructured Loans \| Commercial and Industrial \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Commercial and Industrial \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Residential Mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	1	0	1
Amortized Cost Basis	$ 0	$ 2,106,000	$ 0	$ 2,106,000
% of Total Class of Financing Receivable	0.00%	0.27%	0.00%	0.27%
Portfolio Loans	$ 0	$ 2,106,000	$ 0	$ 2,106,000
Nonaccrual Restructured Loans \| Residential Mortgages \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	2,106,000	0	2,106,000
Nonaccrual Restructured Loans \| Residential Mortgages \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Residential Mortgages \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Other Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	0
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Other Consumer \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Other Consumer \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Other Consumer \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	0	0
Amortized Cost Basis	$ 0	$ 0	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%	0.00%	0.00%
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Construction \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Construction \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Construction \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0
Nonaccrual Restructured Loans \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts \| contract	0	0	9	11
Amortized Cost Basis	$ 0	$ 0	$ 228,554,000	$ 280,905,000
% of Total Class of Financing Receivable	0.00%	0.00%	98.64%	98.86%
Portfolio Loans	$ 228,554,000	$ 280,905,000	$ 228,554,000	$ 280,905,000
Nonaccrual Restructured Loans \| Other \| Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	228,554,000	280,905,000	228,554,000	280,905,000
Nonaccrual Restructured Loans \| Other \| 30-89 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	0	0	0	0
Nonaccrual Restructured Loans \| Other \| 90+ Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Portfolio Loans	$ 0	$ 0	$ 0	$ 0

Carter Bankshares, Inc. 10-Q