ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	$ 1,272,290,000
Balance at end of period	1,223,120,000
Income tax provision (benefit)	(9,289,000)	$ (8,965,000)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	4,637,000	(1,379,000)
Other comprehensive loss	(14,000)	(6,614,000)
Balance at end of period	4,623,000	(7,993,000)
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period	4,637,000	(1,379,000)
Other comprehensive loss	(14,000)	(6,614,000)
Balance at end of period	4,623,000	(7,993,000)
Income tax provision (benefit)	$ 0	$ 0