PARENT COMPANY FINANCIAL INFORMATION - Statements of Condition (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 518,963	$ 545,898
Goodwill	309,045	363,436	$ 363,436
Other assets	318,553	313,051
Total assets	14,127,480	14,028,172
Liabilities
Subordinated debt	371,400	370,803
Accrued expenses and other liabilities	133,493	147,657
Total liabilities	12,569,469	12,440,030
Stockholders’ Equity:
Common stock	45,140	44,914
Additional paid-in capital	748,905	742,243
Retained earnings	856,613	898,316
Accumulated other comprehensive loss	(92,647)	(97,331)
Total stockholders' equity	1,558,011	1,588,142	$ 1,483,768	$ 1,519,679
Total liabilities and stockholders' equity	14,127,480	14,028,172
Parent Company
Assets
Cash and cash equivalents	99,664	125,165
Other investments	568	568
Investment in subsidiary	1,828,350	1,831,553
Goodwill	1,292	1,292
Other assets	3,095	3,451
Total assets	1,932,969	1,962,029
Liabilities
Subordinated debt	371,400	370,803
Accrued expenses and other liabilities	3,557	3,084
Total liabilities	374,957	373,887
Stockholders’ Equity:
Common stock	45,140	44,914
Additional paid-in capital	748,905	742,243
Retained earnings	856,613	898,316
Accumulated other comprehensive loss	(92,647)	(97,331)
Total stockholders' equity	1,558,011	1,588,142
Total liabilities and stockholders' equity	$ 1,932,969	$ 1,962,029