Condensed Consolidated Statement of Shareholders' Equity Statement - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Capital in Excess of Par Value	Retained Deficit	Accumulated Other Comprehensive Loss (note 10)
Balance, value at Dec. 31, 2014	$ 77,454	$ 218	$ (1,060)	$ 331,391	$ (114,648)	$ (138,447)
Balance, shares at Dec. 31, 2014		21,843,851	34,985
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	17,506				17,506
Other comprehensive income (loss)	4,442					4,442
Stock compensation expense	3,121			3,121
Dividends	(4,800)				(4,800)
Stock withheld for employee taxes	(588)			(588)
Stock issued, value	3,009		$ 10,451	(7,442)
Stock issued, shares			(300,601)
Purchase of treasury shares, value	(15,275)		$ (15,275)
Purchase of treasury shares, shares			412,473
Balance, value at Jun. 30, 2015	$ 84,869	$ 218	$ (5,884)	$ 326,482	$ (101,942)	$ (134,005)
Balance, shares at Jun. 30, 2015		21,843,851	146,857