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Allowance for Credit Losses and Allowance for Unfunded Commitments and Letters of Credit (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 149,935 | $ 142,988 | $ 149,935 | $ 142,988 | $ 146,949 | $ 155,578 | $ 148,294 | $ 149,140
Financing Receivable, Allowance for Credit Loss, Writeoff | (636) | (1,940) | (2,537) | (5,406) |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 1,522 | 2,134 | 2,594 | 5,554 |  |  |  |
Provision (recapture) for credit losses | 2,100 | (5,500) | (5,700) | (6,300) |  |  |  |
Commercial Real Estate [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 57,119 | 53,250 | 57,119 | 53,250 | 57,307 | 61,254 | 57,050 | 68,934
Financing Receivable, Allowance for Credit Loss, Writeoff | (299) | (316) | (299) | (316) |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 147 | 16 | 161 | 52 |  |  |  |
Provision (recapture) for credit losses | (36) | (3,500) | (3,997) | (15,420) |  |  |  |
Commercial Business [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 51,985 | 57,554 | 51,985 | 57,554 | 50,474 | 54,712 | 58,405 | 45,250
Financing Receivable, Allowance for Credit Loss, Writeoff | (92) | (971) | (1,724) | (4,310) |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 797 | 874 | 1,088 | 4,088 |  |  |  |
Provision (recapture) for credit losses | 806 | (754) | (2,091) | 12,526 |  |  |  |
Agriculture [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 8,895 | 7,920 | 8,895 | 7,920 | 8,010 | 8,148 | 9,487 | 9,052
Financing Receivable, Allowance for Credit Loss, Writeoff | (1) | (122) | (24) | (122) |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 24 | 5 | 149 | 17 |  |  |  |
Provision (recapture) for credit losses | 862 | (1,450) | 622 | (1,027) |  |  |  |
Construction [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 5,914 | 6,559 | 5,914 | 6,559 | 5,399 | 5,397 | 6,551 | 7,636
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | 0 | 0 | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 136 | 521 | 144 | 567 |  |  |  |
Provision (recapture) for credit losses | 379 | (513) | 373 | (1,644) |  |  |  |
One-to-Four Family Residential [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 24,626 | 16,519 | 24,626 | 16,519 | 24,356 | 24,123 | 15,638 | 16,875
Financing Receivable, Allowance for Credit Loss, Writeoff | (3) | (146) | (3) | (146) |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 291 | 503 | 585 | 554 |  |  |  |
Provision (recapture) for credit losses | (18) | 524 | (79) | (764) |  |  |  |
Consumer Loan [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 1,396 | 1,186 | 1,396 | 1,186 | $ 1,403 | $ 1,944 | $ 1,163 | $ 1,393
Financing Receivable, Allowance for Credit Loss, Writeoff | (241) | (385) | (487) | (512) |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 127 | 215 | 467 | 276 |  |  |  |
Provision (recapture) for credit losses | $ 107 | $ 193 | $ (528) | $ 29 |  |  |  |

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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
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- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
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