CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 10,447	$ 759
Other comprehensive (loss), net of tax:
Net actuarial pension loss amortization, net of income tax of $0 and $0	1	0
Prior service cost (credit) amortization, net of income tax of $150 and $151	(239)	(238)
Other comprehensive (loss), net of tax	(238)	(238)
Comprehensive income	$ 10,209	$ 521