Consolidated Statements of Changes in Stockholders' Equity - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income.	Total
Balance at Dec. 31, 2016	$ 525	$ 248,748	$ 536,350	$ (346,482)	$ (33,977)	$ 405,164
Increase (Decrease) in Stockholders' Equity
Net loss			(37,022)			(37,022)
Other comprehensive income					12,193	12,193
Issuance of common stock in connection with restricted stock unit awards (1,279,170 shares)	1	(20,215)		20,463		249
Issuance of common stock for the employee stock purchase plan (40,378 shares)		527				527
Shares withheld for net settlements of share-based awards (518,777 shares)				(10,484)		(10,484)
Purchase of common stock for treasury (371,704 shares)				(7,404)		(7,404)
Dividend declared on common stock		13	(7,002)	73		(6,916)
Share-based compensation		15,730				15,730
Cumulative effect of accounting change		866	(643)			223
Balance at Sep. 30, 2017	$ 526	$ 245,669	$ 491,683	$ (343,834)	$ (21,784)	$ 372,260