Condensed Consolidated Statement of Shareholders' Equity Statement - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Capital in Excess of Par Value	Retained Deficit	Accumulated Other Comprehensive Loss (note 9)
Balance, value at Dec. 31, 2015	$ 148,382	$ 218	$ (4,448)	$ 330,756	$ (57,912)	$ (120,232)
Balance, shares at Dec. 31, 2015		21,843,851	110,717
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,413				9,413
Other comprehensive income	2,652					2,652
Stock compensation expense	2,270			2,270
Income tax effect from share-based compensation arrangements	(469)			(469)
Dividends	(5,032)				(5,032)
Stock withheld for employee taxes	(764)			(764)
Stock issued, value	1,073		$ 6,081	(3,293)
Stock issued, value lower than repurchase price					(1,715)
Stock issued, shares			(200,915)
Purchase of treasury shares, value	(2,000)		$ (2,000)
Purchase of treasury shares, shares			111,292
Balance, value at Jun. 30, 2016	$ 155,525	$ 218	$ (367)	$ 328,500	$ (55,246)	$ (117,580)
Balance, shares at Jun. 30, 2016		21,843,851	21,094