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FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value By Balance Sheet Location) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Reported Value Measurement [Member] |  |
Assets: |  |
Cash and cash equivalents | $ 247,458 | $ 254,464
Loans receivable held for sale | 13,421 | 11,170
Loans receivable | 10,991,000 | 10,660,812
Equity securities | 362 | 449
FHLB stock | 27,311 | 24,028
Bank-owned life insurance | 307,948 | 304,366
Mortgage servicing rights | 13,199 | 13,909
SBA servicing asset | 811 | 740
Investments in limited partnerships | 13,417 | 13,475
Liabilities: |  |
Demand, interest checking and money market accounts | 8,362,094 | 8,571,500
Regular savings | 3,192,036 | 2,980,530
Certificates of deposit | 1,525,133 | 1,477,467
FHLB advances at fair value | 398,000 | 323,000
Other borrowings | 165,956 | 182,877
Junior subordinated debentures at fair value | 66,831 | 66,413
Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Cash and cash equivalents | 247,458 | 254,464
Loans receivable held for sale | 13,608 | 11,219
Loans receivable | 10,597,216 | 10,250,271
Equity securities | 362 | 449
FHLB stock | 27,311 | 24,028
Bank-owned life insurance | 307,948 | 304,366
Mortgage servicing rights | 37,702 | 35,794
SBA servicing asset | 811 | 740
Investments in limited partnerships | 13,417 | 13,475
Liabilities: |  |
Demand, interest checking and money market accounts | 8,362,094 | 8,571,500
Regular savings | 3,192,036 | 2,980,530
Certificates of deposit | 1,513,527 | 1,465,612
FHLB advances at fair value | 398,000 | 323,000
Other borrowings | 165,956 | 182,877
Subordinated notes, net | 84,492 | 85,536
Junior subordinated debentures at fair value | 66,831 | 66,413
Debt Securities, Available-for-Sale | 2,197,693 | 2,373,783
Securities—held-to-maturity | 852,709 | 907,514
FHLB advances at fair value | 398,000 | 323,000
Subordinated notes, net | 89,561 | 92,851
Interest rate swaps [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 26,682 | 15,129
Liabilities: |  |
Derivatives: | 43,780 | 29,809
Interest rate swaps [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 26,682 | 15,129
Liabilities: |  |
Derivatives: | 43,780 | 29,809
Interest Rate Forward Sales Commitments [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 324 | 275
Liabilities: |  |
Derivatives: | 1 | 185
Interest Rate Forward Sales Commitments [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Derivatives: | 324 | 275
Liabilities: |  |
Derivatives: | 1 | 185
Loan Participations and Assignments | Reported Value Measurement [Member] |  |
Liabilities: |  |
Derivatives: | 13 | 42
Loan Participations and Assignments | Estimate of Fair Value Measurement [Member] |  |
Liabilities: |  |
Derivatives: | 13 | 42
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 2,172,260 | 2,348,479
Securities—held-to-maturity | 1,016,211 | 1,052,028
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 2,172,260 | 2,348,479
Securities—held-to-maturity | 845,924 | 900,522
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 25,433 | 25,304
Securities—held-to-maturity | 6,817 | 7,027
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member] |  |
Assets: |  |
Debt Securities, Available-for-Sale | 25,433 | 25,304
Securities—held-to-maturity | $ 6,785 | $ 6,992

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