Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2013	$ 3	$ 477,890	$ (237,204)	$ (2)	$ 6,563	$ 247,250
Balance, shares at Dec. 31, 2013	32,526			(75)
Net (loss) income			14,007			14,007
Other comprehensive income (loss)					(8,975)	(8,975)
Purchase of treasury stock, value				$ (184)		(184)
Purchase of treasury stock, shares				(22)
Issuance of common stock under stock incentive plans, net, value		3,411				3,411
Issuance of common stock under stock incentive plans, net, shares	275
Tax benefit from employee stock options		1,684				1,684
Balance at Dec. 31, 2014	$ 3	482,985	(223,197)	$ (186)	(2,412)	257,193
Balance, shares at Dec. 31, 2014	32,801			(97)
Net (loss) income			(77,542)			(77,542)
Other comprehensive income (loss)					1,202	1,202
Purchase of treasury stock, value				$ (7,134)		(7,134)
Purchase of treasury stock, shares				(1,584)
Issuance of common stock under stock incentive plans, net, value		713				713
Issuance of common stock under stock incentive plans, net, shares	83
Balance at Dec. 31, 2015	$ 3	483,698	(300,739)	$ (7,320)	(1,210)	174,432
Balance, shares at Dec. 31, 2015	32,884			(1,681)
Net (loss) income			(8,978)			(8,978)
Other comprehensive income (loss)					205	205
Purchase of treasury stock, value				$ (5,078)		(5,078)
Purchase of treasury stock, shares				(1,191)
Issuance of common stock under stock incentive plans, net, value		227				227
Issuance of common stock under stock incentive plans, net, shares	4
Balance at Dec. 31, 2016	$ 3	$ 483,925	$ (309,717)	$ (12,398)	$ (1,005)	$ 160,808
Balance, shares at Dec. 31, 2016	32,888			(2,872)