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LOANS RECEIVABLE AND THE ALLOWANCE FOR CREDIT LOSSES (Age Analysis of Company's Past Due Loans) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 11,224,606 | $ 10,810,455
Non-accrual with no Allowance | 16,849 | 11,714
Nonaccrual loans | 39,049 | 26,857
Loans 90 days or more past due and still accruing | 3,958 | 2,745
Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 990,516 | 915,897
Non-accrual with no Allowance | 1,044 | 1,391
Nonaccrual loans | 1,094 | 1,450
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 990,516 | 915,897
Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,583,863 | 1,541,344
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 0 | 0
Loans 90 days or more past due and still accruing | 2,258 | 0
Financing Receivable, before Allowance for Credit Loss | 1,583,863 | 1,541,344
Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,218,822 | 1,178,500
Non-accrual with no Allowance | 581 | 755
Nonaccrual loans | 1,033 | 1,227
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 1,218,822 | 1,178,500
Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 889,866 | 811,232
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 0 | 0
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 889,866 | 811,232
Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 124,051 | 170,011
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 0 | 0
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 124,051 | 170,011
Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 524,108 | 503,993
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 0 | 0
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 524,108 | 503,993
One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 507,350 | 526,432
Non-accrual with no Allowance | 1,834 | 2,852
Nonaccrual loans | 1,942 | 3,105
Loans 90 days or more past due and still accruing | 380 | 1,096
Financing Receivable, before Allowance for Credit Loss | 507,350 | 526,432
Land and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 370,690 | 336,639
Non-accrual with no Allowance | 1,624 | 0
Nonaccrual loans | 2,344 | 0
Loans 90 days or more past due and still accruing | 0 | 42
Financing Receivable, before Allowance for Credit Loss | 370,690 | 336,639
Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,281,615 | 1,255,734
Non-accrual with no Allowance | 123 | 789
Nonaccrual loans | 7,777 | 7,346
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 1,281,615 | 1,255,734
Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,087,714 | 1,022,154
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 2,928 | 1,656
Loans 90 days or more past due and still accruing | 0 | 1
Financing Receivable, before Allowance for Credit Loss | 1,087,714 | 1,022,154
Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 346,686 | 331,089
Non-accrual with no Allowance | 5,455 | 3,167
Nonaccrual loans | 7,703 | 3,167
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 346,686 | 331,089
One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,575,164 | 1,518,046
Non-accrual with no Allowance | 5,367 | 1,939
Nonaccrual loans | 9,592 | 5,702
Loans 90 days or more past due and still accruing | 961 | 1,205
Financing Receivable, before Allowance for Credit Loss | 1,575,164 | 1,518,046
Consumer—home equity revolving lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 622,615 | 588,703
Non-accrual with no Allowance | 821 | 821
Nonaccrual loans | 4,631 | 3,110
Loans 90 days or more past due and still accruing | 359 | 391
Financing Receivable, before Allowance for Credit Loss | 622,615 | 588,703
Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 101,546 | 110,681
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 5 | 94
Loans 90 days or more past due and still accruing | 0 | 10
Financing Receivable, before Allowance for Credit Loss | 101,546 | 110,681
30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,373 | 15,936
30 to 59 Days Past Due [Member] | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 212 | 0
30 to 59 Days Past Due [Member] | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
30 to 59 Days Past Due [Member] | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 175 | 559
30 to 59 Days Past Due [Member] | Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
30 to 59 Days Past Due [Member] | Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
30 to 59 Days Past Due [Member] | Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
30 to 59 Days Past Due [Member] | One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 286
30 to 59 Days Past Due [Member] | Land and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 1,822
30 to 59 Days Past Due [Member] | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 865 | 1,166
30 to 59 Days Past Due [Member] | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,828 | 2,050
30 to 59 Days Past Due [Member] | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,519 | 0
30 to 59 Days Past Due [Member] | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 297 | 6,864
30 to 59 Days Past Due [Member] | Consumer—home equity revolving lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,967 | 2,772
30 to 59 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 510 | 417
60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,220 | 10,280
60 to 89 Days Past Due [Member] | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 333 | 0
60 to 89 Days Past Due [Member] | Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | Land and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 83 | 553
60 to 89 Days Past Due [Member] | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,500 | 5,735
60 to 89 Days Past Due [Member] | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 684 | 633
60 to 89 Days Past Due [Member] | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,500 | 0
60 to 89 Days Past Due [Member] | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,818 | 2,379
60 to 89 Days Past Due [Member] | Consumer—home equity revolving lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,202 | 839
60 to 89 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 100 | 141
90 Days or More Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 26,063 | 16,948
90 Days or More Past Due [Member] | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,044 | 0
90 Days or More Past Due [Member] | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,258 | 0
90 Days or More Past Due [Member] | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 413 | 413
90 Days or More Past Due [Member] | Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
90 Days or More Past Due [Member] | Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
90 Days or More Past Due [Member] | Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
90 Days or More Past Due [Member] | One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,225 | 4,201
90 Days or More Past Due [Member] | Land and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,778 | 42
90 Days or More Past Due [Member] | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,565 | 1,181
90 Days or More Past Due [Member] | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,303 | 959
90 Days or More Past Due [Member] | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,856 | 2,171
90 Days or More Past Due [Member] | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,644 | 5,258
90 Days or More Past Due [Member] | Consumer—home equity revolving lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,977 | 2,627
90 Days or More Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 96
Financial Asset, Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 44,656 | 43,164
Financial Asset, Past Due | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,256 | 0
Financial Asset, Past Due | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,258 | 0
Financial Asset, Past Due | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 921 | 972
Financial Asset, Past Due | Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Past Due | Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Past Due | Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Past Due | One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,225 | 4,487
Financial Asset, Past Due | Land and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,861 | 2,417
Financial Asset, Past Due | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,930 | 8,082
Financial Asset, Past Due | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,815 | 3,642
Financial Asset, Past Due | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 7,875 | 2,171
Financial Asset, Past Due | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 10,759 | 14,501
Financial Asset, Past Due | Consumer—home equity revolving lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,146 | 6,238
Financial Asset, Past Due | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 610 | 654
Financial Asset, Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 11,179,950 | 10,767,291
Financial Asset, Not Past Due | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 989,260 | 915,897
Financial Asset, Not Past Due | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,581,605 | 1,541,344
Financial Asset, Not Past Due | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,217,901 | 1,177,528
Financial Asset, Not Past Due | Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 889,866 | 811,232
Financial Asset, Not Past Due | Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 124,051 | 170,011
Financial Asset, Not Past Due | Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 524,108 | 503,993
Financial Asset, Not Past Due | One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 506,125 | 521,945
Financial Asset, Not Past Due | Land and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 368,829 | 334,222
Financial Asset, Not Past Due | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,277,685 | 1,247,652
Financial Asset, Not Past Due | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,082,899 | 1,018,512
Financial Asset, Not Past Due | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 338,811 | 328,918
Financial Asset, Not Past Due | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,564,405 | 1,503,545
Financial Asset, Not Past Due | Consumer—home equity revolving lines of credit |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 613,469 | 582,465
Financial Asset, Not Past Due | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 100,936 | $ 110,027

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- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
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