SEGMENT INFORMATION - Reconciliation of Reportable Segment Financial Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Income (Loss):
Income before income taxes	$ 102,633	$ 125,625
Income tax expense	31,935	43,025
Net income	70,698	82,600
Segment Reconciling Items [Member]
Net Income (Loss):
Segment income	145,746	160,911
Other operating expenses	43,113	35,286
Income before income taxes	102,633	125,625
Income tax expense	31,935	43,025
Net income	70,698	82,600
Average assets:
Total average earning assets for segments	17,709,528	19,306,990
Average non-earning assets	847,628	947,011
Total consolidated average assets	$ 18,557,156	$ 20,254,001