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LOANS RECEIVABLE AND THE ALLOWANCE FOR CREDIT LOSSES (Age Analysis of Company's Past Due Loans) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total loans | $ 9,146,629 | $ 9,084,763
Non-accrual with no Allowance | 8,580 | 11,765
Nonaccrual loans | 17,925 | 22,281
Loans 90 days or more past due and still accruing | 682 | 555
Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 872,801 | 831,623
Non-accrual with no Allowance | 0 | 924
Nonaccrual loans | 301 | 1,456
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 872,801 | 831,623
Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 1,670,896 | 1,674,027
Non-accrual with no Allowance | 3,565 | 3,706
Nonaccrual loans | 5,953 | 6,282
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 1,670,896 | 1,674,027
Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 1,162,164 | 1,281,863
Non-accrual with no Allowance | 3,956 | 5,886
Nonaccrual loans | 4,364 | 6,421
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 1,162,164 | 1,281,863
Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 598,588 | 530,885
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 | 598,588 | 530,885
Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 179,796 | 167,998
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 0 | 98
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 179,796 | 167,998
Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 274,015 | 259,116
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 | 274,015 | 259,116
One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 582,800 | 568,753
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 | 582,800 | 568,753
Land and land development - residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 317,560 | 313,454
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 119 | 381
Loans 90 days or more past due and still accruing | 0 | 0
Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 1,139,701 | 1,170,780
Non-accrual with no Allowance | 38 | 228
Nonaccrual loans | 604 | 1,144
Loans 90 days or more past due and still accruing | 351 | 2
Financing Receivable, before Allowance for Credit Loss | 1,139,701 | 1,170,780
Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 817,065 | 792,310
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 1,241 | 1,012
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 817,065 | 792,310
Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 245,288 | 280,578
Non-accrual with no Allowance | 1,021 | 1,021
Nonaccrual loans | 1,021 | 1,022
Loans 90 days or more past due and still accruing | 0 | 0
Financing Receivable, before Allowance for Credit Loss | 245,288 | 280,578
One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 718,403 | 657,474
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 2,199 | 2,711
Loans 90 days or more past due and still accruing | 210 | 436
Financing Receivable, before Allowance for Credit Loss | 718,403 | 657,474
Consumer secured by one- to four-family [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 470,485 | 458,533
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 2,056 | 1,736
Loans 90 days or more past due and still accruing | 114 | 114
Consumer-other |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans | 97,067 | 97,369
Non-accrual with no Allowance | 0 | 0
Nonaccrual loans | 67 | 18
Loans 90 days or more past due and still accruing | 7 | 3
30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,647 | 10,527
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 | 0 | 233
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 | 1,504 | 81
30 to 59 Days Past Due [Member] | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,397 | 89
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 | 162
30 to 59 Days Past Due [Member] | Land and land development - residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 106 | 51
30 to 59 Days Past Due [Member] | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 664 | 5,157
30 to 59 Days Past Due [Member] | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,078 | 924
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 | 65 | 139
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 | 1,916 | 2,318
30 to 59 Days Past Due [Member] | Consumer secured by one- to four-family [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 668 | 985
30 to 59 Days Past Due [Member] | Consumer-other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 249 | 388
60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 5,353 | 2,142
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 | 221 | 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 | 2,071 | 0
60 to 89 Days Past Due [Member] | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,140 | 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 - residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
60 to 89 Days Past Due [Member] | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 116 | 1,007
60 to 89 Days Past Due [Member] | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 455 | 465
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 | 0 | 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 | 1,151 | 327
60 to 89 Days Past Due [Member] | Consumer secured by one- to four-family [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 77 | 268
60 to 89 Days Past Due [Member] | Consumer-other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 122 | 75
90 Days or More Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 5,231 | 6,019
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 | 0 | 448
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 | 0 | 0
90 Days or More Past Due [Member] | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2 | 1,298
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 | 98
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 | 0 | 0
90 Days or More Past Due [Member] | Land and land development - residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 14
90 Days or More Past Due [Member] | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 509 | 588
90 Days or More Past Due [Member] | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 864 | 508
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 | 1,021 | 1,021
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 | 1,645 | 1,225
90 Days or More Past Due [Member] | Consumer secured by one- to four-family [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,120 | 803
90 Days or More Past Due [Member] | Consumer-other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 70 | 16
Financial Asset, Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 19,231 | 18,688
Financial Asset, Past Due | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 221 | 681
Financial Asset, Past Due | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,575 | 81
Financial Asset, Past Due | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,539 | 1,387
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 | 98
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 | 0 | 162
Financial Asset, Past Due | Land and land development - residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 106 | 65
Financial Asset, Past Due | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,289 | 6,752
Financial Asset, Past Due | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,397 | 1,897
Financial Asset, Past Due | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,086 | 1,160
Financial Asset, Past Due | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,712 | 3,870
Financial Asset, Past Due | Consumer secured by one- to four-family [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,865 | 2,056
Financial Asset, Past Due | Consumer-other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 441 | 479
Financial Asset, Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,127,398 | 9,066,075
Financial Asset, Not Past Due | Commerical real estate - owner-occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 872,580 | 830,942
Financial Asset, Not Past Due | Commercial real estate - investment properties |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,667,321 | 1,673,946
Financial Asset, Not Past Due | Small balance CRE |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,159,625 | 1,280,476
Financial Asset, Not Past Due | Multifamily Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 598,588 | 530,885
Financial Asset, Not Past Due | Commercial construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 179,796 | 167,900
Financial Asset, Not Past Due | Multifamily construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 274,015 | 259,116
Financial Asset, Not Past Due | One- to four- family construction |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 582,800 | 568,591
Financial Asset, Not Past Due | Land and land development - residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 317,454 | 313,389
Financial Asset, Not Past Due | Commercial Business |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,138,412 | 1,164,028
Financial Asset, Not Past Due | Small business scored |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 813,668 | 790,413
Financial Asset, Not Past Due | Agricultural business, including secured by farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 244,202 | 279,418
Financial Asset, Not Past Due | One- to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 713,691 | 653,604
Financial Asset, Not Past Due | Consumer secured by one- to four-family [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 468,620 | 456,477
Financial Asset, Not Past Due | Consumer-other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 96,626 | $ 96,890

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