PARENT COMPANY FINANCIAL INFORMATION - Statements of Condition (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 545,898	$ 192,232
Goodwill	363,436	363,436	$ 370,223
Other assets	313,051	333,331
Total assets	14,028,172	13,833,119
Liabilities
Subordinated debt	370,803	370,205
Accrued expenses and other liabilities	147,657	153,758
Total liabilities	12,440,030	12,349,351
Stockholders’ Equity:
Common stock	44,914	44,657
Additional paid-in capital	742,243	734,273
Retained earnings	898,316	836,789
Accumulated other comprehensive loss	(97,331)	(131,951)
Total stockholders' equity	1,588,142	1,483,768	$ 1,519,679	$ 1,469,955
Total liabilities and stockholders' equity	14,028,172	13,833,119
Parent Company
Assets
Cash and cash equivalents	125,165	83,923
Other investments	568	568
Investment in subsidiary	1,831,553	1,767,933
Goodwill	1,292	1,292
Other assets	3,451	3,375
Total assets	1,962,029	1,857,091
Liabilities
Subordinated debt	370,803	370,205
Accrued expenses and other liabilities	3,084	3,118
Total liabilities	373,887	373,323
Stockholders’ Equity:
Common stock	44,914	44,657
Additional paid-in capital	742,243	734,273
Retained earnings	898,316	836,789
Accumulated other comprehensive loss	(97,331)	(131,951)
Total stockholders' equity	1,588,142	1,483,768
Total liabilities and stockholders' equity	$ 1,962,029	$ 1,857,091