ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax
Beginning balance	$ 746,655	$ 790,244	$ 934,389
Other comprehensive income (loss) before reclassifications	746	(77)	(70)
Ending balance	286,119	746,655	790,244
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax
Beginning balance	(3,985)	(3,908)	(3,838)
Ending balance	$ (3,239)	$ (3,985)	$ (3,908)