CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME AND LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (2,992)	$ (531)	$ 47,147	$ 98,204
Other comprehensive income
Unrealized holding gain, net of tax	756	167	907	2,329
Comprehensive (loss) income	$ (2,236)	$ (364)	$ 48,054	$ 100,533