Condensed Financial Information (Parent Company Only) - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
NET INCOME	$ 215,713	$ 92,940	$ 96,814
OTHER COMPREHENSIVE INCOME (LOSS)
Equity in other comprehensive (loss) income of subsidiaries	(10,110)	964	(12,547)
COMPREHENSIVE INCOME	205,603	93,904	84,267
Parent Company
NET INCOME	215,713	92,940	96,814
OTHER COMPREHENSIVE INCOME (LOSS)
Equity in other comprehensive (loss) income of subsidiaries	(10,110)	964	(12,547)
COMPREHENSIVE INCOME	$ 205,603	$ 93,904	$ 84,267