OTHER BALANCE SHEET DETAILS - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 176,040	$ 401,166	$ 588,203	$ 853,362	$ 926,190	$ 1,016,247	$ 588,203	$ 1,016,247
Other comprehensive income before reclassifications							383	9,311
Amounts reclassified from other comprehensive income (loss)							(10,907)	81
Total other comprehensive (loss) income	(1,559)	(4,159)	(4,806)	1,851	636	6,905	(10,524)	9,392
Ending balance	(67,638)	176,040	401,166	755,893	853,362	926,190	(67,638)	755,893
Loss on Investment in Joint Venture
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(32,792)			(32,792)	(32,792)	(32,792)
Other comprehensive income before reclassifications							0	0
Amounts reclassified from other comprehensive income (loss)							0	0
Total other comprehensive (loss) income							0	0
Ending balance	(32,792)			(32,792)			(32,792)	(32,792)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(2,811)			(3,754)	(2,811)	(3,754)
Other comprehensive income before reclassifications							0	0
Amounts reclassified from other comprehensive income (loss)							103	174
Total other comprehensive (loss) income							103	174
Ending balance	(2,708)			(3,580)			(2,708)	(3,580)
Unrealized (Losses) Gains from Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(1,630)			348	(1,630)	348
Other comprehensive income before reclassifications							6	(219)
Amounts reclassified from other comprehensive income (loss)							(11,010)	(93)
Total other comprehensive (loss) income							(11,004)	(312)
Ending balance	(12,634)			36			(12,634)	36
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			3,974			(7,424)	3,974	(7,424)
Other comprehensive income before reclassifications							377	9,530
Amounts reclassified from other comprehensive income (loss)							0	0
Total other comprehensive (loss) income							377	9,530
Ending balance	4,351			2,106			4,351	2,106
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(42,224)	(38,065)	(33,259)	(36,081)	(36,717)	(43,622)	(33,259)	(43,622)
Total other comprehensive (loss) income	(1,559)	(4,159)	(4,806)	1,851	636	6,905
Ending balance	$ (43,783)	$ (42,224)	$ (38,065)	$ (34,230)	$ (36,081)	$ (36,717)	$ (43,783)	$ (34,230)