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SELECTED QUARTERLY INFORMATION - UNAUDITED (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Selected Quarterly Financial Information [Abstract]
Total revenue, net	$ 388,647	$ 370,232	$ 258,665	$ 354,324	$ 395,127	$ 379,095	$ 383,645	$ 359,690	$ 1,371,868	$ 1,517,557	$ 1,472,441
Gross margin	241,578	235,421	153,187	220,848	245,665	236,459	239,974	230,778	851,034	952,876
Net income (loss)	$ 92,744	$ 32,337	$ (369)	$ 9,180	$ 15,319	$ (27,610)	$ 29,736	$ 32,756	$ 133,892	$ 50,201	$ 60,801
Per Share-Basic (in dollars per share)	$ 1.10	$ 0.38	$ (0.00)	$ 0.11	$ 0.18	$ (0.32)	$ 0.35	$ 0.38	$ 1.58	$ 0.59	$ 0.73
Per Share-Diluted (in dollars per share)	$ 1.09	$ 0.38	$ (0.00)	$ 0.11	$ 0.18	$ (0.32)	$ 0.34	$ 0.38	$ 1.57	$ 0.58	$ 0.72

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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

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