CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ (4,514)	$ (112,296)	$ 2,103	$ (110,694)
Other comprehensive income (loss), net of tax
Change in fair value of investments in available-for-sale securities, net of tax		0	0	0	(578)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		0	0	0	603
Total change in unrealized gains (losses) on investments in available-for-sale securities, net of tax	[1]	0	0	0	(1,181)
Total other comprehensive income (loss), net of tax		0	0	0	(1,181)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		(4,514)	(112,296)	2,103	(111,875)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		(95)	0	(158)	0
Comprehensive income		$ (4,419)	$ (112,296)	$ 2,261	$ (111,875)

[1] Net of tax of