XML 106 R84.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Note 6 - Loans and Allowance for Credit Losses - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | $ 35,843 |  | $ 31,146 |  | $ 31,572
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 10,151 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 18,089 | [1] | (225) | [2] | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (4,833) |  | (613) |  | (1,549)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 679 |  | 1,678 |  | 1,123
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 59,929 |  | 35,843 |  | 31,146
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 18,089 | [1] | (225) | [2] | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (4,833) |  | (613) |  | (1,549)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 679 |  | 1,678 |  | 1,123
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 3,857 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 3,857
Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 31,146 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 31,146
Consumer Borrower [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 7,872 |  | 7,715 |  | 8,766
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 308 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 2,358 | [1] | (1,993) | [2] | (1,350)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (843) |  | (177) |  | (153)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 104 |  | 223 |  | 452
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 9,799 |  | 7,872 |  | 7,715
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 2,358 | [1] | (1,993) | [2] | (1,350)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (843) |  | (177) |  | (153)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 104 |  | 223 |  | 452
Consumer Borrower [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 2,145 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 2,145
Consumer Borrower [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 7,674 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 7,674
Consumer Borrower [Member] | Consumer, Other [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 540 |  | 512
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) |  |  |  |  | 11
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs |  |  |  |  | (153)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery |  |  |  |  | 170
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 540
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions |  |  |  |  | 11
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs |  |  |  |  | (153)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery |  |  |  |  | 170
Consumer Borrower [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 9,705 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 92 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 1,598 | [1] | 827 | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (3,727) |  | (436) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 502 |  | 1,159 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 8,170 |  | 9,705 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 1,598 | [1] | 827 | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (3,727) |  | (436) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 502 |  | 1,159 |  |
Consumer Borrower [Member] | Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (535) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (535)
Consumer Borrower [Member] | Commercial Portfolio Segment [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 8,690 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 8,690
Consumer Borrower [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 7,671 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 295 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 1,976 | [1] | (1,719) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (657) |  | (126) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 74 |  | 131 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 9,359 |  | 7,671 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 1,976 | [1] | (1,719) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (657) |  | (126) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 74 |  | 131 |  |
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 2,242 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 2,242
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 7,143 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 7,143
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 6,087 |  | 5,857 |  | 6,874
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 219 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 615 | [1] | (1,201) | [2] | (1,017)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | (9) |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 2 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 6,921 |  | 6,087 |  | 5,857
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 615 | [1] | (1,201) | [2] | (1,017)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | (9) |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 2 |  | 0
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 1,800 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 1,800
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 5,495 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 5,495
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 264 |  | 1,318 |  | 1,380
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 19 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 1,023 | [1] | 24 | [2] | (344)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (638) |  | (77) |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 74 |  | 50 |  | 282
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 742 |  | 264 |  | 1,318
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 1,023 | [1] | 24 | [2] | (344)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (638) |  | (77) |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 74 |  | 50 |  | 282
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (85) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (85)
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 352 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 352
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 485 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 34 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | (162) | [1] | (328) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 357 |  | 485 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (162) | [1] | (328) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 0 |  |
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 468 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 468
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 345 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 345
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 835 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 23 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 500 | [1] | (214) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (19) |  | (40) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 79 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 1,339 |  | 835 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 500 | [1] | (214) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (19) |  | (40) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 79 |  |
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 59 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 59
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 951 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 951
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 201 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 13 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 382 | [1] | (274) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (186) |  | (51) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 30 |  | 92 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 440 |  | 201 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 382 | [1] | (274) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (186) |  | (51) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 30 |  | 92 |  |
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (97) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (97)
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 531 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 531
Commercial Borrower [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 27,971 |  | 12,761 |  | 12,778
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 9,843 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 15,731 | [1] | 1,768 | [2] | (151)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (3,990) |  | (436) |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 575 |  | 1,455 |  | 134
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 50,130 |  | 27,971 |  | 12,761
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 15,731 | [1] | 1,768 | [2] | (151)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (3,990) |  | (436) |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 575 |  | 1,455 |  | 134
Commercial Borrower [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 1,712 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 1,712
Commercial Borrower [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 23,472 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 23,472
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (3,727) |  | (436) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (3,727) |  | (436) |  |
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 18,086 |  | 1,437 |  | 810
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 9,136 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 13,701 | [1] | 1,131 | [2] | 551
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (237) |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 46 |  | 295 |  | 76
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 40,732 |  | 18,086 |  | 1,437
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 13,701 | [1] | 1,131 | [2] | 551
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (237) |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 46 |  | 295 |  | 76
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 2,409 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 2,409
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 14,251 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 14,251
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 6,135 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 1,595 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 8,547 | [1] | 1,875 | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 251 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 16,277 |  | 6,135 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 8,547 | [1] | 1,875 | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 251 |  |
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 2,551 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 2,551
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 1,458 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 1,458
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 1,776 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 1,154 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 1,786 | [1] | 876 | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 4,716 |  | 1,776 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 1,786 | [1] | 876 | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 0 |  |
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (162) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (162)
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 1,062 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 1,062
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 7,726 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 5,682 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 3,105 | [1] | (1,161) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 16,513 |  | 7,726 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 3,105 | [1] | (1,161) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 0 |  | 0 |  |
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 1,344 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 1,344
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 7,543 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 7,543
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 2,449 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 705 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 263 | [1] | (459) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (237) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 46 |  | 44 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 3,226 |  | 2,449 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 263 | [1] | (459) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (237) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 46 |  | 44 |  |
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (1,324) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (1,324)
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 4,188 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 4,188
Commercial Borrower [Member] | Real Estate Construction Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 9,233 |  | 9,218
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) |  |  |  |  | 950
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs |  |  |  |  | (1,396)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery |  |  |  |  | 461
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 9,233
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions |  |  |  |  | 950
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs |  |  |  |  | (1,396)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery |  |  |  |  | 461
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 180 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 615 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 432 | [1] | (190) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (26) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 27 |  | 1 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 1,228 |  | 180 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 432 | [1] | (190) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (26) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 27 |  | 1 |  |
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (162) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (162)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 531 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 531
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 96 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 229 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 252 | [1] | (100) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 20 |  | 1 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 597 |  | 96 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 252 | [1] | (100) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 20 |  | 1 |  |
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (86) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (86)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | 281 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | 281
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 84 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date | 386 |  |  |  |
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) | 180 | [1] | (90) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (26) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | 7 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 631 |  | 84 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 180 | [1] | (90) | [2] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (26) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery | $ 7 |  | 0 |  |
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | (76) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | (76)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Previously Reported [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  | $ 250 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance |  |  |  |  | $ 250
[1] | The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of ($81) million related to off-balance sheet credit exposure and $133 thousand related to investment securities held-to-maturity.
[2] | The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of $44 thousand related to off-balance sheet credit exposure and $46 thousand related to HTM investment securities.

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 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 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 2: 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 + 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. 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 + 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 19 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-19 Reference 2: 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 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201613Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_ConsumerBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_CommercialBorrowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=alrs_RealEstateConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=alrs_AgriculturalRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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