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LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 141,465 | $ 132,099 | $ 167,279
Provision for Loan and Lease Losses | 11,097 | 8,158 | (33,112)
Recoveries | 2,788 | 3,921 | 4,615
Charge-offs | (5,707) | (2,713) | (6,683)
Ending balance | $ 149,643 | $ 141,465 | $ 132,099
Net loan charge-offs as a percent of average outstanding loans during the period | (0.03%) | 0.01% | (0.02%)
Commercial Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 44,086 | $ 52,995 | $ 57,791
Provision for Loan and Lease Losses | 259 | 9,299 | (2,758)
Recoveries | 557 | 392 | 1,729
Charge-offs | 0 | (2) | (3,767)
Ending balance | $ 44,384 | $ 44,086 | $ 52,995
Net loan charge-offs as a percent of average outstanding loans during the period | 0.01% | 0.00% | (0.02%)
Multifamily Real Estate [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 7,734 | $ 7,043 | $ 3,893
Provision for Loan and Lease Losses | 1,592 | 691 | 3,209
Recoveries | 0 | 0 | 0
Charge-offs | 0 | 0 | (59)
Ending balance | $ 9,326 | $ 7,734 | $ 7,043
Net loan charge-offs as a percent of average outstanding loans during the period | 0.00% | 0.00% | 0.00%
Construction and Land [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 29,171 | $ 27,294 | $ 41,295
Provision for Loan and Lease Losses | (16) | 1,523 | (14,101)
Recoveries | 29 | 384 | 100
Charge-offs | (1,089) | (30) | 0
Ending balance | $ 28,095 | $ 29,171 | $ 27,294
Net loan charge-offs as a percent of average outstanding loans during the period | (0.01%) | 0.00% | 0.00%
Commercial business [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 33,299 | $ 26,421 | $ 35,007
Provision for Loan and Lease Losses | 3,532 | 6,654 | (8,621)
Recoveries | 1,283 | 1,923 | 1,797
Charge-offs | (1,161) | (1,699) | (1,762)
Ending balance | $ 35,464 | $ 33,299 | $ 26,421
Net loan charge-offs as a percent of average outstanding loans during the period | (0.01%) | 0.00% | 0.00%
Agricultural Business [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 3,475 | $ 3,190 | $ 4,914
Provision for Loan and Lease Losses | 808 | 148 | 1,573
Recoveries | 146 | 475 | 30
Charge-offs | (564) | (42) | (181)
Ending balance | $ 3,865 | $ 3,475 | $ 3,190
Net loan charge-offs as a percent of average outstanding loans during the period | 0.00% | 0.00% | 0.00%
One- to four-family residential [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 14,729 | $ 8,205 | $ 9,913
Provision for Loan and Lease Losses | 4,354 | 6,343 | 1,907
Recoveries | 230 | 181 | 199
Charge-offs | (42) | 0 | 0
Ending balance | $ 19,271 | $ 14,729 | $ 8,205
Net loan charge-offs as a percent of average outstanding loans during the period | 0.00% | 0.00% | 0.00%
Consumer [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 8,971 | $ 6,951 | $ 14,466
Provision for Loan and Lease Losses | 1,086 | 2,394 | (7,361)
Recoveries | 543 | 566 | 760
Charge-offs | (1,362) | (940) | (914)
Ending balance | $ 9,238 | $ 8,971 | $ 6,951
Net loan charge-offs as a percent of average outstanding loans during the period | (0.01%) | 0.00% | 0.00%
Commercial and Small Business Scored |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Charge-offs | $ (2,650) |  |

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