Loans - Risk Category of Loans by Class (Details)) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 5,884,448	$ 4,133,267
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	3,572	2,901	$ 3,791
Commercial and Industrial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	141,369	118,292
Year two	108,253	88,748
Year three	69,585	94,374
Year four	84,744	68,523
Year five	57,279	19,250
Prior	58,662	54,844
Revolving Loans Amortized Cost Basis	241,275	147,754
Total	761,167	591,785
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0	0
Year two	306	4
Year three	0	96
Year four	138	64
Year five	0	0
Prior	77	13
Revolving Loans Amortized Cost Basis	243	46
Total	764	223	1,792
Commercial and Industrial Loans \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	139,921	118,037
Year two	105,911	86,412
Year three	64,427	93,406
Year four	77,540	64,298
Year five	52,599	17,140
Prior	45,106	49,181
Revolving Loans Amortized Cost Basis	231,427	143,096
Total	716,931	571,570
Commercial and Industrial Loans \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,171	147
Year two	714	1,709
Year three	2,077	787
Year four	1,221	1,061
Year five	286	1,202
Prior	2,046	2,044
Revolving Loans Amortized Cost Basis	5,364	1,023
Total	12,879	7,973
Commercial and Industrial Loans \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	277	108
Year two	1,628	627
Year three	3,081	181
Year four	5,983	3,164
Year five	4,394	908
Prior	11,510	3,619
Revolving Loans Amortized Cost Basis	4,484	3,635
Total	31,357	12,242
Commercial and Industrial Loans \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Commercial Real Estate Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	456,091	327,921
Year two	438,051	329,595
Year three	403,784	412,441
Year four	521,291	405,248
Year five	460,607	189,824
Prior	825,788	520,372
Revolving Loans Amortized Cost Basis	36,860	39,471
Total	3,142,472	2,224,872
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	26	308
Revolving Loans Amortized Cost Basis	0	0
Total	26	308	56
Commercial Real Estate Loans \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	455,803	327,488
Year two	435,591	315,981
Year three	385,103	410,135
Year four	515,257	394,698
Year five	443,780	187,849
Prior	774,987	502,263
Revolving Loans Amortized Cost Basis	36,077	39,271
Total	3,046,598	2,177,685
Commercial Real Estate Loans \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	220	433
Year two	2,448	13,433
Year three	17,816	1,740
Year four	3,173	5,395
Year five	7,879	1,975
Prior	22,681	12,349
Revolving Loans Amortized Cost Basis	783	200
Total	55,000	35,525
Commercial Real Estate Loans \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	68	0
Year two	12	181
Year three	865	566
Year four	2,861	5,155
Year five	8,948	0
Prior	28,120	5,760
Revolving Loans Amortized Cost Basis	0	0
Total	40,874	11,662
Commercial Real Estate Loans \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Agricultural Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	59,474	47,901
Year two	38,254	36,805
Year three	36,793	48,251
Year four	47,879	34,488
Year five	32,295	40,801
Prior	142,676	118,475
Revolving Loans Amortized Cost Basis	131,797	104,316
Total	489,168	431,037
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	8
Revolving Loans Amortized Cost Basis	0	0
Total	0	8	27
Agricultural Loans \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	54,791	47,179
Year two	35,843	35,379
Year three	33,138	48,105
Year four	45,677	33,666
Year five	29,011	35,726
Prior	126,308	103,702
Revolving Loans Amortized Cost Basis	118,304	102,251
Total	443,072	406,008
Agricultural Loans \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	4,683	547
Year two	1,974	1,426
Year three	2,823	146
Year four	2,138	822
Year five	3,183	5,075
Prior	11,842	10,676
Revolving Loans Amortized Cost Basis	12,510	2,065
Total	39,153	20,757
Agricultural Loans \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	175
Year two	437	0
Year three	832	0
Year four	64	0
Year five	101	0
Prior	4,526	4,097
Revolving Loans Amortized Cost Basis	983	0
Total	6,943	4,272
Agricultural Loans \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Leases
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	33,383	32,214
Year two	24,235	26,392
Year three	19,668	8,272
Year four	4,356	6,578
Year five	2,064	2,128
Prior	3,367	3,669
Revolving Loans Amortized Cost Basis	0	0
Total	87,073	79,253
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0	$ 0
Leases \| Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	33,383	32,214
Year two	24,235	26,392
Year three	19,668	8,272
Year four	4,356	6,578
Year five	2,064	2,128
Prior	3,367	3,669
Revolving Loans Amortized Cost Basis	0	0
Total	87,073	79,253
Leases \| Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Leases \| Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Leases \| Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	$ 0	$ 0

GERMAN AMERICAN BANCORP, INC. 10-K