CONDENSED HOLDING COMPANY ONLY FINANCIAL STATEMENTS - CONDENSED STATEMENTS OF FINANCIAL CONDITION (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS:
Cash and due from banks	$ 457,547	$ 169,297
Securities available-for-sale, at fair value	886,240	950,587
Other assets	100,013	108,945
Total assets	13,636,005	13,189,921
LIABILITIES AND STOCKHOLDERS' EQUITY:
Subordinated debt, net	200,196	200,283
Other liabilities	81,110	82,573
Stockholders' equity	1,226,225	1,169,583	$ 1,192,620	$ 701,096
Total liabilities and stockholders' equity	13,636,005	13,189,921
Parent Company
ASSETS:
Cash and due from banks	35,114	25,009
Securities available-for-sale, at fair value	2,693	2,489
Investment in subsidiaries	1,395,526	1,348,962
Other assets	4,401	4,389
Total assets	1,437,734	1,380,849
LIABILITIES AND STOCKHOLDERS' EQUITY:
Subordinated debt, net	200,196	200,283
Other liabilities	11,313	10,983
Stockholders' equity	1,226,225	1,169,583
Total liabilities and stockholders' equity	$ 1,437,734	$ 1,380,849