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LOANS AND ALLOWANCE FOR CREDIT LOSSES (Schedule of Loan Receivables) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
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Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | $ 6,631,294 |  | $ 6,051,045 |  |  |
Deferred fees, net of origination costs | (18,505) |  | (16,969) |  |  |
Loans, net of deferred fees and costs | 6,612,789 |  | 6,034,076 |  |  |
Allowance for credit losses | (74,071) | $ (67,803) | (63,273) | $ (60,008) | $ (58,538) | $ (57,965)
Net loans | 6,538,718 |  | 5,970,803 |  |  |
Loan encumbered | 106,600 |  | 65,500 |  |  |
Asset Pledged as Collateral |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Loan pledged | 3,500,000 |  | 3,300,000 |  |  |
Loan encumbered | 521,000 |  | 348,800 |  |  |
Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 5,603,969 |  | 4,991,938 |  |  |
Commercial and industrial |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 1,016,056 |  | 1,046,146 |  |  |
Allowance for credit losses | (12,724) | (12,433) | (10,991) | (11,282) | (10,937) | (11,207)
Consumer |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 11,269 |  | 12,961 |  |  |
Allowance for credit losses | (303) | (344) | (383) | (525) | (493) | (480)
Commercial |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 4,849,152 |  | 4,317,361 |  |  |
Commercial | Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 4,849,152 |  | 4,317,361 |  |  |
Allowance for credit losses | (50,455) | (44,647) | (42,070) | (38,484) | (36,704) | (35,635)
Construction |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 251,693 |  | 206,960 |  |  |
Construction | Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 251,693 |  | 206,960 |  |  |
Allowance for credit losses | (2,340) | (2,518) | (1,962) | (1,759) | (1,712) | (1,765)
Multi-family |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 414,248 |  | 376,737 |  |  |
Multi-family | Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 414,248 |  | 376,737 |  |  |
Allowance for credit losses | (7,671) | (7,259) | (7,290) | (7,827) | (8,171) | (8,215)
One-to-four-family |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 88,876 |  | 90,880 |  |  |
One-to-four-family | Real Estate |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Total loans | 88,876 |  | 90,880 |  |  |
Allowance for credit losses | $ (578) | $ (602) | $ (577) | $ (131) | $ (521) | $ (663)

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