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LOANS AND ALLOWANCE FOR CREDIT LOSSES (Collateral dependent loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	$ 6,799,717	$ 6,051,045
Commercial
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	5,070,880	4,317,361
Multi-family
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	405,714	376,737
One-to-four-family
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	87,384	90,880
Collateral dependent loans
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	88,738	75,239
Collateral dependent loans | Commercial
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	36,320	24,000
Collateral dependent loans | Multi-family
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	49,967	$ 51,239
Collateral dependent loans | One-to-four-family
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	$ 2,451

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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable.

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