CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total		Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2013		$ 820,146	[1]	$ 7,444	$ (998,234)	$ 411,954	$ (39,888)	$ 1,438,870	[1]
Balance (in Shares) at Dec. 31, 2013				74,435,628	(34,714,083)
Net income (loss)	[1]	112,115						112,115
Unrealized translation adjustments		(5,262)	[1]				(5,262)
Minimum pension liability adjustments, net of tax expense of $10,853, $2,071 and $6,135 in 2014, 2015 and 2016 respectively		(17,044)	[1]				(17,044)
Unrealized benefit (loss) on interest rate swaps and cash flow hedges, net of tax benefit (expense) of $(380), $135 & $(52) in 2014, 2015 & 2016 respectively		(597)	[1]				(597)
Comprehensive income (loss)		89,212	[1]				(22,903)	112,115	[1]
Cash dividend declared, $0.56 per share, $0.56 per share and $0.56 per share in 2014, 2015 and 2016 respectively	[1]	(21,761)						(21,761)
Acquisition of treasury stock		(50,591)	[1]		$ (50,591)
Acquisition of treasury stock (in shares)					(1,255,705)
Stock compensation		$ 6,661	[1]		$ 6,324	337
Stock compensation (in shares)		250,747			250,747
Balance at Dec. 31, 2014		$ 843,667	[1]	$ 7,444	$ (1,042,501)	412,291	(62,791)	1,529,224	[1]
Balance (in Shares) at Dec. 31, 2014				74,435,628	(35,719,041)
Net income (loss)	[1]	(44,342)						(44,342)
Unrealized translation adjustments		(9,075)	[1]				(9,075)
Translation loss realized through disposition of business		11,132	[1]				11,132
Minimum pension liability adjustments, net of tax expense of $10,853, $2,071 and $6,135 in 2014, 2015 and 2016 respectively		3,271	[1]				3,271
Unrealized benefit (loss) on interest rate swaps and cash flow hedges, net of tax benefit (expense) of $(380), $135 & $(52) in 2014, 2015 & 2016 respectively		(128)	[1]				(128)
Comprehensive income (loss)		(39,142)	[1]				5,200	(44,342)	[1]
Cash dividend declared, $0.56 per share, $0.56 per share and $0.56 per share in 2014, 2015 and 2016 respectively	[1]	(21,061)						(21,061)
Acquisition of treasury stock		$ (67,446)	[1]		$ (67,446)
Acquisition of treasury stock (in shares)		(1,822,227)			(1,822,227)
Stock compensation		$ 7,716	[1]		$ 9,080	(1,364)
Stock compensation (in shares)		362,874			362,874
Balance at Dec. 31, 2015		$ 723,734	[1]	$ 7,444	$ (1,100,867)	410,927	(57,591)	1,463,821	[1]
Balance (in Shares) at Dec. 31, 2015				74,435,628	(37,178,394)
Net income (loss)	[1]	63,852						63,852
Unrealized translation adjustments		1,427	[1]				1,427
Minimum pension liability adjustments, net of tax expense of $10,853, $2,071 and $6,135 in 2014, 2015 and 2016 respectively		9,682	[1]				9,682
Unrealized benefit (loss) on interest rate swaps and cash flow hedges, net of tax benefit (expense) of $(380), $135 & $(52) in 2014, 2015 & 2016 respectively		26	[1]				26
Comprehensive income (loss)		74,987	[1]				11,135	63,852	[1]
Cash dividend declared, $0.56 per share, $0.56 per share and $0.56 per share in 2014, 2015 and 2016 respectively	[1]	(20,616)						(20,616)
Acquisition of treasury stock		$ (6,839)	[1]		$ (6,839)
Acquisition of treasury stock (in shares)		(241,270)			(241,270)
Stock compensation		$ 9,840	[1]		$ 10,962	(1,122)
Stock compensation (in shares)		468,142			468,142
Balance at Dec. 31, 2016		$ 781,106	[1]	$ 7,444	$ (1,096,744)	$ 409,805	$ (46,456)	$ 1,507,057	[1]
Balance (in Shares) at Dec. 31, 2016				74,435,628	(36,951,522)

[1] Revised in 2015 for the impact of the changes in accounting principle related to inventory accounting.