UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 7,214	$ 8,333
Other comprehensive income/(loss); change in funded status of pension plan	0	0
Comprehensive income	$ 7,214	$ 8,333