UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 10,792	$ 1,739
Other comprehensive income (loss); change in funded status of pension plan	0	0
Comprehensive income	$ 10,792	$ 1,739