UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 4,480	$ 7,214
Other comprehensive income/(loss); change in funded status of pension plan	0	0
Comprehensive income	$ 4,480	$ 7,214