ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period			$ 1,272,290,000
Balance at end of period	$ 1,157,911,000		1,157,911,000
Income tax provision (benefit)	(4,791,000)	$ (11,698,000)	(23,209,000)	$ (17,638,000)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	5,973,000	(2,740,000)	4,637,000	(1,379,000)
Other comprehensive income	(1,040,000)	1,755,000	296,000	394,000
Balance at end of period	4,933,000	(985,000)	4,933,000	(985,000)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	5,973,000	(2,740,000)	4,637,000	(1,379,000)
Other comprehensive income	(1,040,000)	1,755,000	296,000	394,000
Balance at end of period	$ 4,933,000	$ (985,000)	4,933,000	(985,000)
Income tax provision (benefit)			$ 0	$ 0