Consolidated Statements of Shareholders Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Contributed Capital	Retained Earnings	Accumulated Other Comprehensive Earnings/(Loss)	Treasury Stock
Beginning Balance at Dec. 31, 2013	$ 296,729	$ 297,164	$ 39,631	$ 358,997	$ (81,897)	$ (317,166)
Increase (Decrease) in Stockholders' Equity
Net (loss) earnings	26,522			26,522
Changes in fair market value of hedges, net of tax	(40)				(40)
Changes in unrealized pension cost, net of tax	(21,062)				(21,062)
Cumulative translation adjustment, net of tax	(1,234)				(1,234)
Cash dividends	(5,374)			(5,374)
Acquired shares for treasury stock	(8,002)					(8,002)
Issued shares on exercise of options — net	1,204	1,328	(124)
Issued shares on vesting of restricted stock units	(1,911)	1,400	(3,311)
Tax benefit on vesting of restricted stock units	297		297
Stock compensation	2,660		2,660
Ending balance at Dec. 31, 2014	289,789	299,892	39,153	380,145	(104,233)	(325,168)
Increase (Decrease) in Stockholders' Equity
Net (loss) earnings	6,954			6,954
Changes in fair market value of hedges, net of tax	157				157
Changes in unrealized pension cost, net of tax	6,809				6,809
Cumulative translation adjustment, net of tax	(1,738)				(1,738)
Cash dividends	(5,259)			(5,259)
Acquired shares for treasury stock	(18,088)					(18,088)
Issued shares on exercise of options — net	64	64	0
Issued shares on vesting of restricted stock units	(542)	953	(1,495)
Tax benefit on vesting of restricted stock units	313		313
Stock compensation	3,195		3,195
Ending balance at Dec. 31, 2015	281,654	300,909	41,166	381,840	(99,005)	(343,256)
Increase (Decrease) in Stockholders' Equity
Net (loss) earnings	34,380			34,380
Changes in fair market value of hedges, net of tax	553				553
Changes in unrealized pension cost, net of tax	6,412				6,412
Cumulative translation adjustment, net of tax	(1,154)				(1,154)
Cash dividends	(5,241)			(5,241)
Issued shares on vesting of restricted stock units	(1,384)	1,923	(3,307)
Stock compensation	2,662		2,662
Ending balance at Dec. 31, 2016	$ 317,882	$ 302,832	$ 40,521	$ 410,979	$ (93,194)	$ (343,256)