Consolidated Statements of Comprehensive Loss Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (323,466)	$ (291,276)	$ (295,028)
Other comprehensive income (loss), net of taxes:
Unrealized gain (loss) on available-for-sale securities	14	26	(13)
Change in effective portion of interest rate swap	(295)	267	393
Other comprehensive income	(281)	293	380
Comprehensive loss	$ (323,747)	$ (290,983)	$ (294,648)