INCOME TAX - Reconciliation of U.S. Statutory Income Tax Rate to Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal income tax expense at statutory rate	$ 33,386	$ 36,759	$ 33,566
State income tax, net of federal income tax benefit	5,594	6,677	6,999
Net operating loss carryback	3,391	(3,445)	0
Excess tax benefits of share-based compensation	(47,675)	(60,190)	(29,819)
Tax credits	(4,999)	(3,867)	(3,446)
Non-deductible business expenses	7,542	4,199	6,011
Other, net	284	89	0
Income tax expense benefit	$ (2,477)	$ (19,778)	$ 13,311