Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Treasury stock [Member]	Accumulated other comprehensive income, net [Member]	Total
Balance in the beginning at Dec. 31, 2014	$ 512	$ 993,212	$ 40,528	$ (245,516)	$ 5,839	$ 794,575
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)			(95)			(95)
Stock-based compensation		1,510				1,510
Issuance under equity compensation plan, including tax benefit of $8	1	(268)				(267)
Repurchase of 1,671,923 and 3,894,673 shares for the six months ended June 30, 2016 and 2015, respectively				(72,338)		(72,338)
Dividends paid ($.10 per share for the six months ended June 30, 2016 and 2015, respectively)			(3,724)			(3,724)
Other comprehensive income (loss)					(1,395)	(1,395)
Balance in the ending at Jun. 30, 2015	513	994,454	36,709	(317,854)	4,444	718,266
Balance in the beginning at Dec. 31, 2015	513	997,926	38,670	(419,660)	95	617,544
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)			4,755			4,755
Stock-based compensation		1,791				1,791
Issuance of stock under equity compensation and ASPP plans, including tax benefit of $39	1	(2,862)		2,422		(439)
Repurchase of 1,671,923 and 3,894,673 shares for the six months ended June 30, 2016 and 2015, respectively				(32,918)		(32,918)
Dividends paid ($.10 per share for the six months ended June 30, 2016 and 2015, respectively)			(3,006)			(3,006)
Other comprehensive income (loss)					11,183	11,183
Balance in the ending at Jun. 30, 2016	$ 514	$ 996,855	$ 40,419	$ (450,156)	$ 11,278	$ 598,910