SEGMENT REPORTING - Reconciliation of Operating Income to Consolidated Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Adjustment for:
Amortization of intangible assets			$ 6,243	$ 7,617
Income from operations	$ 6,753	$ 22,847	17,668	37,663
Interest expense	3,930	4,885	8,307	9,925
Other income, net	133	185	(701)	152
Income before income taxes	2,690	17,777	10,062	27,586
Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Operating income for reportable segments	25,582	39,042	56,691	68,907
Segment Reconciling Items
Adjustment for:
Amortization of intangible assets	3,046	3,803	6,243	7,617
Corporate
Adjustment for:
Corporate expenses	$ 15,783	$ 12,392	$ 32,780	$ 23,627