CONDENSED HOLDING COMPANY ONLY FINANCIAL STATEMENTS - CONDENSED STATEMENTS OF FINANCIAL CONDITION (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS:
Cash and due from banks	$ 169,297	$ 393,722
Debt Securities, Available-for-Sale, Excluding Accrued Interest	950,587	1,563,711
Securities available-for-sale, at fair value	950,587	1,563,711
Other assets	108,945	65,224
Total assets	13,189,921	12,066,364
LIABILITIES AND STOCKHOLDERS' EQUITY:
Subordinated debt, net	200,283	197,096
Other liabilities	82,573	79,431
Stockholders' equity	1,169,583	1,192,620	$ 701,096	$ 596,758
Total liabilities and stockholders' equity	13,189,921	12,066,364
Parent Company
ASSETS:
Cash and due from banks	25,009	27,364
Debt Securities, Available-for-Sale, Excluding Accrued Interest	2,489	3,068
Securities available-for-sale, at fair value	2,489	3,068
Investment in subsidiaries	1,348,962	1,366,796
Other assets	4,389	4,285
Total assets	1,380,849	1,401,513
LIABILITIES AND STOCKHOLDERS' EQUITY:
Subordinated debt, net	200,283	197,096
Other liabilities	10,983	11,797
Stockholders' equity	1,169,583	1,192,620
Total liabilities and stockholders' equity	$ 1,380,849	$ 1,401,513