Condensed Consolidated Statement of Shareholders' Equity Statement - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Deficit	Accumulated Other Comprehensive Loss
Balance, value at Dec. 31, 2016	$ 145,119	$ 219	$ 329,722	$ (59,625)	$ (125,197)
Balance, shares at Dec. 31, 2016		21,864,541
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment for the adoption of ASU 2016-09	2,310		127	2,183
Net income (loss)	(6,570)			(6,570)
Other comprehensive income	2,029				2,029
Stock compensation expense	784		784
Dividends	(2,577)			(2,577)
Stock withheld for employee taxes	(423)		(423)
Stock issued, value	(3)		(3)
Stock issued, shares		38,409
Balance, value at Mar. 31, 2017	$ 140,669	$ 219	$ 330,207	$ (66,589)	$ (123,168)
Balance, shares at Mar. 31, 2017		21,902,950