Loans and Allowance for Credit Losses - Summary of Aging Analysis of Past Due Loans By Portfolio Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Total loans	$ 2,245,007	$ 2,194,979
Current
Financing Receivable, Past Due [Line Items]
Total loans	2,232,073	2,187,743
30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	2,228	4,809
90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans	10,706	2,427
Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	12,934	7,236
Home Equity and Second Mortgages
Financing Receivable, Past Due [Line Items]
Total loans	74,439
Home Equity and Second Mortgages \| Current
Financing Receivable, Past Due [Line Items]
Total loans	73,808
Home Equity and Second Mortgages \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	631
Home Equity and Second Mortgages \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	631
One to Four Family Residential
Financing Receivable, Past Due [Line Items]
Total loans	514,108
One to Four Family Residential \| Current
Financing Receivable, Past Due [Line Items]
Total loans	513,886
One to Four Family Residential \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	117
One to Four Family Residential \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans	105
One to Four Family Residential \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	222
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total loans	512,509	484,106
Commercial Real Estate \| Current
Financing Receivable, Past Due [Line Items]
Total loans	511,748	483,477
Commercial Real Estate \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	761	629
Commercial Real Estate \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	761	629
Commercial Real Estate Multi-family
Financing Receivable, Past Due [Line Items]
Total loans	91,845	83,905
Commercial Real Estate Multi-family \| Current
Financing Receivable, Past Due [Line Items]
Total loans	91,845	83,905
Commercial & Industrial
Financing Receivable, Past Due [Line Items]
Total loans	502,434
Commercial & Industrial \| Current
Financing Receivable, Past Due [Line Items]
Total loans	500,048
Commercial & Industrial \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	715
Commercial & Industrial \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans	1,671
Commercial & Industrial \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	2,386
Condominium Associations
Financing Receivable, Past Due [Line Items]
Total loans	496,161	494,875
Condominium Associations \| Current
Financing Receivable, Past Due [Line Items]
Total loans	496,161	494,875
PPP Loans
Financing Receivable, Past Due [Line Items]
Total loans	68	264
PPP Loans \| Current
Financing Receivable, Past Due [Line Items]
Total loans	68	264
Consumer
Financing Receivable, Past Due [Line Items]
Total loans	4,543
Consumer \| Current
Financing Receivable, Past Due [Line Items]
Total loans	4,539
Consumer \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans	4
Consumer \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	4
Business Manager
Financing Receivable, Past Due [Line Items]
Total loans		1,939
Business Manager \| Current
Financing Receivable, Past Due [Line Items]
Total loans		1,939
Construction & Land
Financing Receivable, Past Due [Line Items]
Total loans	48,900	49,028
Construction & Land \| Current
Financing Receivable, Past Due [Line Items]
Total loans	39,970	47,522
Construction & Land \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,506
Construction & Land \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans	8,930
Construction & Land \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans	$ 8,930	1,506
Dental Commercial & Industrial
Financing Receivable, Past Due [Line Items]
Total loans		190,519
Dental Commercial & Industrial \| Current
Financing Receivable, Past Due [Line Items]
Total loans		189,986
Dental Commercial & Industrial \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		533
Dental Commercial & Industrial \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		533
Other Business
Financing Receivable, Past Due [Line Items]
Total loans		203,570
Other Business \| Current
Financing Receivable, Past Due [Line Items]
Total loans		202,011
Other Business \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		251
Other Business \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,308
Other Business \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,559
Solar
Financing Receivable, Past Due [Line Items]
Total loans		76,888
Solar \| Current
Financing Receivable, Past Due [Line Items]
Total loans		76,812
Solar \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		76
Solar \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		76
Vehicle Financing
Financing Receivable, Past Due [Line Items]
Total loans		27,004
Vehicle Financing \| Current
Financing Receivable, Past Due [Line Items]
Total loans		27,004
Home Equity
Financing Receivable, Past Due [Line Items]
Total loans		66,326
Home Equity \| Current
Financing Receivable, Past Due [Line Items]
Total loans		65,231
Home Equity \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		395
Home Equity \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans		700
Home Equity \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,095
Residential
Financing Receivable, Past Due [Line Items]
Total loans		511,495
Residential \| Current
Financing Receivable, Past Due [Line Items]
Total loans		509,695
Residential \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,381
Residential \| 90 Days or More Past Due
Financing Receivable, Past Due [Line Items]
Total loans		419
Residential \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,800
Overdraft and Unsecured
Financing Receivable, Past Due [Line Items]
Total loans		887
Overdraft and Unsecured \| Current
Financing Receivable, Past Due [Line Items]
Total loans		887
Consumer Installment
Financing Receivable, Past Due [Line Items]
Total loans		3,715
Consumer Installment \| Current
Financing Receivable, Past Due [Line Items]
Total loans		3,715
Passbook CD Loans
Financing Receivable, Past Due [Line Items]
Total loans		458
Passbook CD Loans \| Current
Financing Receivable, Past Due [Line Items]
Total loans		420
Passbook CD Loans \| 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total loans		38
Passbook CD Loans \| Total Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 38

Avidia Bancorp, Inc. 10-Q