PARENT COMPANY FINANCIAL INFORMATION - Statements of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income:
Other income	$ 9,869	$ 3,976	$ 4,768
Expenses:
Total interest expense	25,766	60,401	82,561
Income tax expense (benefit)	76,552	27,471	36,428
Net income	235,107	96,953	116,433
Parent Company
Income:
Cash dividends from subsidiary	189,172	74,410	42,625
Other income	434	932	1,093
Total income	189,606	75,342	43,718
Expenses:
Interest	6,765	9,028	3,141
Other expenses	1,592	1,505	1,507
Total interest expense	8,357	10,533	4,648
Income before income tax expense	181,249	64,809	39,070
Income tax expense (benefit)	(1,563)	(1,988)	(734)
Income before equity in undistributed income of subsidiary	182,812	66,797	39,804
Equity in undistributed income of subsidiary	52,295	30,156	76,629
Net income	$ 235,107	$ 96,953	$ 116,433