XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.25.3

Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | $ 76,105 | $ 43,946 | $ 44,436 | $ 43,765 | $ 43,765
Change in Accounting Method |  |  | (7) |  |
2/1/2025 Acquired Heartland PCD |  |  | 16,503 |  |
Day 2 CECL Provision - Heartland |  |  | 16,200 |  |
Provision (Benefit) for Credit Loss Expense | 700 | 625 | 1,007 | 2,150 |
Loans Charged-off | (1,126) | (619) | (2,772) | (2,279) |
Recoveries Collected | 378 | 172 | 690 | 488 |
Total Ending Allowance Balance | 76,057 | 44,124 | 76,057 | 44,124 | 44,436
Commercial and Industrial Loans |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 17,739 | 7,200 | 7,059 | 7,921 | 7,921
Change in Accounting Method |  |  | 1,438 |  |
2/1/2025 Acquired Heartland PCD |  |  | 5,246 |  |
Day 2 CECL Provision - Heartland |  |  | 1,797 |  |
Provision (Benefit) for Credit Loss Expense | 272 | (137) | 2,817 | (768) |
Loans Charged-off | (384) | (92) | (757) | (223) | (223)
Recoveries Collected | 6 | 3 | 33 | 44 |
Total Ending Allowance Balance | 17,633 | 6,974 | 17,633 | 6,974 | 7,059
Commercial Real Estate Loans |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 38,803 | 26,598 | 25,818 | 25,923 | 25,923
Change in Accounting Method |  |  | (3,271) |  |
2/1/2025 Acquired Heartland PCD |  |  | 7,675 |  |
Day 2 CECL Provision - Heartland |  |  | 7,522 |  |
Provision (Benefit) for Credit Loss Expense | 329 | 54 | 1,414 | 1,028 |
Loans Charged-off | 0 | 0 | (26) | (308) | (308)
Recoveries Collected | 0 | 4 | 0 | 13 |
Total Ending Allowance Balance | 39,132 | 26,656 | 39,132 | 26,656 | 25,818
Agricultural Loans |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 3,130 | 3,697 | 4,917 | 3,837 | 3,837
Change in Accounting Method |  |  | (1,655) |  |
2/1/2025 Acquired Heartland PCD |  |  | 3,352 |  |
Day 2 CECL Provision - Heartland |  |  | 170 |  |
Provision (Benefit) for Credit Loss Expense | 98 | 211 | (3,556) | 70 |
Loans Charged-off | 0 | (7) | 0 | (8) | (8)
Recoveries Collected | 0 | 0 | 0 | 2 |
Total Ending Allowance Balance | 3,228 | 3,901 | 3,228 | 3,901 | 4,917
Leases |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 1,192 | 368 | 397 | 346 | 346
Change in Accounting Method |  |  | 720 |  |
2/1/2025 Acquired Heartland PCD |  |  | 0 |  |
Day 2 CECL Provision - Heartland |  |  | 0 |  |
Provision (Benefit) for Credit Loss Expense | (16) | 28 | 59 | 50 |
Loans Charged-off | 0 | 0 | 0 | 0 | 0
Recoveries Collected | 0 | 0 | 0 | 0 |
Total Ending Allowance Balance | 1,176 | 396 | 1,176 | 396 | 397
Consumer Loans |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 691 | 722 | 727 | 759 | 759
Change in Accounting Method |  |  | (284) |  |
2/1/2025 Acquired Heartland PCD |  |  | 20 |  |
Day 2 CECL Provision - Heartland |  |  | 179 |  |
Provision (Benefit) for Credit Loss Expense | 303 | 224 | 789 | 700 |
Loans Charged-off | (446) | (364) | (1,105) | (1,117) | (1,511)
Recoveries Collected | 138 | 158 | 360 | 398 |
Total Ending Allowance Balance | 686 | 740 | 686 | 740 | 727
Home Equity Loans |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 4,334 | 2,058 | 2,196 | 1,834 | 1,834
Change in Accounting Method |  |  | 1,056 |  |
2/1/2025 Acquired Heartland PCD |  |  | 11 |  |
Day 2 CECL Provision - Heartland |  |  | 570 |  |
Provision (Benefit) for Credit Loss Expense | 46 | 72 | 538 | 421 |
Loans Charged-off | (71) | 0 | (71) | (134) | (170)
Recoveries Collected | 5 | 0 | 14 | 9 |
Total Ending Allowance Balance | 4,314 | 2,130 | 4,314 | 2,130 | 2,196
Credit Cards |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 621 | 413 | 520 | 383 | 383
Change in Accounting Method |  |  | (24) |  |
2/1/2025 Acquired Heartland PCD |  |  | 0 |  |
Day 2 CECL Provision - Heartland |  |  | 0 |  |
Provision (Benefit) for Credit Loss Expense | 26 | 202 | 657 | 550 |
Loans Charged-off | (182) | (156) | (742) | (489) |
Recoveries Collected | 208 | 7 | 262 | 22 |
Total Ending Allowance Balance | 673 | 466 | 673 | 466 | 520
Residential Mortgage Loans |  |  |  |  |
Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Beginning Balance | 9,595 | 2,890 | 2,802 | 2,762 | 2,762
Change in Accounting Method |  |  | 2,013 |  |
2/1/2025 Acquired Heartland PCD |  |  | 199 |  |
Day 2 CECL Provision - Heartland |  |  | 5,962 |  |
Provision (Benefit) for Credit Loss Expense | (358) | (29) | (1,711) | 99 |
Loans Charged-off | (43) | 0 | (71) | 0 | 0
Recoveries Collected | 21 | 0 | 21 | 0 |
Total Ending Allowance Balance | $ 9,215 | $ 2,861 | $ 9,215 | $ 2,861 | $ 2,802

X
- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable from change in methodology. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-11 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestChangeInMethodCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-22 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-19 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding accrued interest, of credit loss expense on financing receivable transferred into held-for-investment out of held-for-sale classification. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477011/948-310-45-2 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestTransferToHeldForInvestmentAllowanceForCreditLossExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=gabc_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=gabc_AgriculturalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=gabc_LeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CreditCardReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |