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FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value By Balance Sheet Location) (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Reported Value Measurement [Member] |  |
Assets: |  |
Cash and cash equivalents | $ 441,945 | $ 501,858
Loans receivable held for sale | 24,536 | 32,021
Loans receivable | 11,281,473 | 11,199,135
Equity securities | 515 | 481
FHLB stock | 17,286 | 22,451
Bank-owned life insurance | 313,942 | 312,549
Mortgage servicing rights | 12,467 | 12,618
SBA servicing asset | 954 | 869
Investments in limited partnerships | 15,648 | 13,955
Liabilities: |  |
Demand, interest checking and money market accounts | 8,547,210 | 8,536,303
Regular savings | 3,542,005 | 3,478,423
Certificates of deposit | 1,504,050 | 1,499,672
FHLB advances at fair value | 168,000 | 290,000
Other borrowings | 130,588 | 125,257
Junior subordinated debentures at fair value | 67,711 | 67,477
Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Cash and cash equivalents | 441,945 | 501,858
Loans receivable held for sale | 24,714 | 32,215
Loans receivable | 11,043,715 | 10,894,024
Equity securities | 515 | 481
FHLB stock | 17,286 | 22,451
Bank-owned life insurance | 313,942 | 312,549
Mortgage servicing rights | 36,029 | 37,926
SBA servicing asset | 954 | 869
Investments in limited partnerships | 15,648 | 13,955
Liabilities: |  |
Demand, interest checking and money market accounts | 8,547,210 | 8,536,303
Regular savings | 3,542,005 | 3,478,423
Certificates of deposit | 1,496,936 | 1,492,829
FHLB advances at fair value | 168,000 | 290,000
Other borrowings | 130,588 | 125,257
Subordinated notes, net | 79,081 | 78,832
Junior subordinated debentures at fair value | 67,711 | 67,477
Debt Securities, Available-for-Sale | 2,108,945 | 2,104,511
Securities—held-to-maturity | 819,261 | 825,528
FHLB advances at fair value | 168,000 | 290,000
Subordinated notes, net | 80,389 | 80,278
Interest rate swaps [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 11,776 | 14,507
Liabilities: |  |
Derivatives: | 24,393 | 30,184
Interest rate swaps [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 11,776 | 14,507
Liabilities: |  |
Derivatives: | 24,393 | 30,184
Interest Rate Forward Sales Commitments [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 388 | 331
Liabilities: |  |
Derivatives: | 144 | 2
Interest Rate Forward Sales Commitments [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 388 | 331
Liabilities: |  |
Derivatives: | 144 | 2
Loan Participations and Assignments | Reported Value Measurement [Member] |  |
Liabilities: |  |
Derivatives: | 10 | 6
Loan Participations and Assignments | Estimate of Fair Value Measurement [Member] |  |
Liabilities: |  |
Derivatives: | 10 | 6
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 2,083,189 | 2,078,826
Securities—held-to-maturity | 985,506 | 995,237
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 2,083,189 | 2,078,826
Securities—held-to-maturity | 813,010 | 819,230
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 25,756 | 25,685
Securities—held-to-maturity | 6,290 | 6,327
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 25,756 | 25,685
Securities—held-to-maturity | $ 6,251 | $ 6,298

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