Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net (Loss) Income	$ (73,282)	$ 19,867	$ 11,378
Pension Adjustments:
Amortization of actuarial (loss) gain included in net income, net of tax (expense) benefit of $(330), $156 and $408 for 2015, 2014 and 2013, respectively	(557)	263	685
Actuarial gain (loss) arising during the period, net of tax expense (benefit) of $966, $(1,810), and $1,737 for 2015, 2014 and 2013, respectively	1,605	(3,052)	2,921
Other Comprehensive Income (Loss)	1,048	(2,789)	3,606
Comprehensive (Loss) Income	$ (72,234)	$ 17,078	$ 14,984