CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.36	$ 0.28	$ 0.28
Change in fair value of derivative instruments, tax benefit	$ 0	$ 54	$ 41
Reclassified to statement of operations related to hedging activities, tax benefit (expense)			139
Pension liability adjustment, tax benefit (expense)	$ 678	$ 394	$ 16,073