Consolidated Statements of Shareholders Equity - USD ($)	Total	Common Stock	Additional Contributed Capital	Retained Earnings	Accumulated Other Comprehensive Earnings/(Loss)	Treasury Stock
Beginning Balance at Dec. 31, 2015	$ 281,654,000	$ 300,909,000	$ 41,166,000	$ 381,840,000	$ (99,005,000)	$ (343,256,000)
Increase (Decrease) in Stockholders' Equity
Net (loss) earnings	34,380,000			34,380,000
Changes in fair market value of hedges, net of tax	553,000				553,000
Changes in unrealized pension cost, net of tax	6,412,000				6,412,000
Cumulative translation adjustment, net of tax	(1,154,000)				(1,154,000)
Cash dividends	(5,241,000)			(5,241,000)
Issued shares on vesting of restricted stock units	(1,384,000)	1,923,000	(3,307,000)
Stock compensation	2,662,000		2,662,000
Ending balance at Dec. 31, 2016	317,882,000	302,832,000	40,521,000	410,979,000	(93,194,000)	(343,256,000)
Increase (Decrease) in Stockholders' Equity
Net (loss) earnings	14,448,000			14,448,000
Changes in fair market value of hedges, net of tax	110,000				110,000
Changes in unrealized pension cost, net of tax	13,687,000				13,687,000
Cumulative translation adjustment, net of tax	437,000				437,000
Cash dividends	(5,267,000)			(5,267,000)
Issued shares on vesting of restricted stock units	(1,604,000)	1,945,000	(3,549,000)
Stock compensation	4,112,000		4,112,000
Ending balance at Dec. 31, 2017	343,805,000	304,777,000	41,084,000	420,160,000	(78,960,000)	(343,256,000)
Increase (Decrease) in Stockholders' Equity
Treasury Stock, Value	343,256,000
Net (loss) earnings	46,532,000			46,532,000
Changes in fair market value of hedges, net of tax	795,000				795,000
Changes in unrealized pension cost, net of tax	(1,830,000)				(1,830,000)
Stock Repurchased During Period, Value	0
Cumulative translation adjustment, net of tax	(311,000)				(311,000)
Cash dividends	(5,278,000)			(5,278,000)
Acquired shares for treasury stock	(9,440,000)
Issued shares on vesting of restricted stock units	(1,469,000)	1,920,000	(3,389,000)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0			17,433,000	(17,433,000)
Stock compensation	5,125,000		5,125,000
Ending balance at Dec. 31, 2018	377,929,000	$ 306,697,000	$ 42,820,000	$ 478,847,000	$ (97,739,000)	$ (352,696,000)
Increase (Decrease) in Stockholders' Equity
Treasury Stock, Value	$ 352,696,000