Consolidated Statements of Stockholders' Deficit - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2017		83,567
Beginning balance at Dec. 31, 2017	$ (185,921)	$ 130	$ (1,725,349)	$ 1,001,315	$ 543,814	$ (5,831)
Increase (Decrease) in Stockholders' Equity
Comprehensive income	5,344				6,190	(846)
Dividend forfeitures on restricted stock	42				42
Restricted stock awards (in shares)		149
Restricted stock awards	0
Minimum tax withholding requirements (in shares)		(54)
Minimum tax withholding requirements	(223)			(223)
Stock-based compensation	1,512			1,512
Ending balance (in shares) at Mar. 31, 2018		83,662
Ending balance at Mar. 31, 2018	(179,246)	$ 130	(1,725,349)	1,002,604	550,046	(6,677)
Beginning balance (in shares) at Dec. 31, 2018		83,886
Beginning balance at Dec. 31, 2018	(114,310)	$ 130	(1,725,349)	1,007,827	613,637	(10,555)
Increase (Decrease) in Stockholders' Equity
Comprehensive income	(16,052)				(15,262)	(790)
Dividend forfeitures on restricted stock	0				0
Restricted stock awards (in shares)		121
Restricted stock awards	0
Minimum tax withholding requirements (in shares)		(41)
Minimum tax withholding requirements	(120)			(120)
Stock-based compensation	1,334			1,334
Ending balance (in shares) at Mar. 31, 2019		83,966
Ending balance at Mar. 31, 2019	$ (189,084)	$ 130	$ (1,725,349)	$ 1,009,041	$ 538,439	$ (11,345)