STOCKHOLDERS' EQUITY - Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 393,217	$ 393,969	$ 520,988	$ 501,565	$ 483,606	$ 473,849
Net unrealized gains (losses) arising during the period	764	788	(6,853)	(1,317)	(394)	(641)
Less: Net realized gains (losses) reclassified to net (loss) income	(2,016)	(1,794)	(1,334)	(318)	(357)	(125)
Net change during the period	2,780	2,582	(5,519)	(999)	(37)	(516)
Balance at end of period	397,365	393,217	393,969	515,058	501,565	483,606
Other comprehensive income (loss) before reclassifications, tax benefit	(169)	(158)	1,759	288	93	308
Reclassification from AOCI, current period, tax benefit	680	604	451	106	121	42
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(6,915)	(9,497)	(3,978)	(3,896)	(3,859)	(3,343)
Balance at end of period	(4,135)	(6,915)	(9,497)	(4,895)	(3,896)	(3,859)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(3,184)	(3,502)	(1,866)	(2,395)	(2,280)	(2,578)
Net unrealized gains (losses) arising during the period	262	318	(1,636)	(463)	(115)	298
Less: Net realized gains (losses) reclassified to net (loss) income	0	0	0	0	0	0
Net change during the period	262	318	(1,636)	(463)	(115)	298
Balance at end of period	(2,922)	(3,184)	(3,502)	(2,858)	(2,395)	(2,280)
Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(3,731)	(5,995)	(2,112)	(1,501)	(1,579)	(765)
Net unrealized gains (losses) arising during the period	502	470	(5,217)	(854)	(279)	(939)
Less: Net realized gains (losses) reclassified to net (loss) income	(2,016)	(1,794)	(1,334)	(318)	(357)	(125)
Net change during the period	2,518	2,264	(3,883)	(536)	78	(814)
Balance at end of period	$ (1,213)	$ (3,731)	$ (5,995)	$ (2,037)	$ (1,501)	$ (1,579)