Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ (58,859)	$ 63,087	$ 114,205
Other comprehensive income
Unrealized gain on available for sale securities, net of tax	0	0	212
Other comprehensive income	0	0	212
Comprehensive income (loss)	$ (58,859)	$ 63,087	$ 114,417