Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Provision for income taxes	$ 64,265	$ 50,358	$ 61,983
NET INCOME	238,167	215,713	92,940
Preferred stock dividends	339	0	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	237,828	215,713	92,940
Parent Company
Income Statement [Abstract]
Dividends from subsidiaries	67,893	145,980	69,107
Other income	13,658	658	4,111
Income	81,551	146,638	73,218
EXPENSE	40,594	32,714	32,234
Income before income taxes and equity in undistributed net income of subsidiaries	40,957	113,924	40,984
Provision for income taxes	(5,680)	(10,732)	(12,311)
Income before equity in undistributed net income of subsidiaries	46,637	124,656	53,295
Equity in undistributed net income of subsidiaries	191,530	91,057	39,645
NET INCOME	238,167	215,713	92,940
Preferred stock dividends	339	0	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 237,828	$ 215,713	$ 92,940