INCOME TAXES - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Lease liabilities	$ 77,879	$ 0
Compensation	54,226	57,666
Accrued expenses	23,179	27,683
Receivables	5,086	8,093
Other	7,417	6,004
Deferred tax liabilities:
Right-of-use assets	(75,352)	0
Intangible assets	(73,166)	(77,059)
Accrued revenue	(14,893)	(19,571)
Prepaid assets	(4,660)	(5,798)
Long-lived assets	(15,134)	(15,615)
Other	(10,873)	(7,167)
Net deferred tax liabilities	$ (26,291)	$ (25,764)