Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 62,273	$ 39,301	$ 48,061
Other comprehensive (loss) income:
Adjustment to pension liability	(592)	5,783	(17,053)
Income tax (benefit) expense	(231)	2,255	(6,650)
Other comprehensive (loss) income	(361)	3,528	(10,403)
Comprehensive income	$ 61,912	$ 42,829	$ 37,658