Statements Of Changes In Statements Of Stockholders’ Equity (USD $) In Thousands, except Share data	Common Stock [Member]		Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2010	$ 23		$ 335,132	$ (119,280)	$ 355	$ (49,127)	$ 167,103
Balance (in Shares) at Dec. 31, 2010	23,253,000
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan	1	[1]		4,483		(2,448)	2,036
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan, shares (in Shares)	423,000
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees		[1]		1,309		(942)	367
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees, shares (in Shares)	124,000						(339,000)
Purchase of treasury stock	(1)			(8,748)			(8,749)
Purchase of treasury stock (in Shares)	(1,298,000)						1,298,000
Equity-based compensation			6,220				6,220
Net income (loss)						(16,242)	(16,242)
Change in foreign currency translation adjustments, net					(2,111)		(2,111)
Balance at Dec. 31, 2011	23		341,352	(122,236)	(1,756)	(68,759)	148,624
Balance (in Shares) at Dec. 31, 2011	22,502,000
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		4,485		(2,507)	1,978
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan, shares (in Shares)	446,000
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees		[1]		86		(86)
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees, shares (in Shares)	9,000						(127,000)
Purchase of treasury stock	(1)			(8,059)			(8,060)
Purchase of treasury stock (in Shares)	(1,283,000)						1,283,000
Equity-based compensation			4,983				4,983
Net income (loss)						(8,042)	(8,042)
Change in foreign currency translation adjustments, net					2,744		2,744
Balance at Dec. 31, 2012	22		346,335	(125,724)	988	(79,394)	142,227
Balance (in Shares) at Dec. 31, 2012	21,674,000
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		3,668		(2,004)	1,664
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan, shares (in Shares)	374,000
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees	1	[1]		6,796		(4,813)	1,984
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees, shares (in Shares)	692,000						(2,105,000)
Purchase of treasury stock	(1)			(3,489)			(3,490)
Purchase of treasury stock (in Shares)	(390,000)						390,000
Equity-based compensation			4,159				4,159
Net income (loss)						2,676	2,676
Change in foreign currency translation adjustments, net					(1,809)		(1,809)
Balance at Dec. 31, 2013	$ 22		$ 350,494	$ (118,749)	$ (821)	$ (83,535)	$ 147,411
Balance (in Shares) at Dec. 31, 2013	22,350,000

[1] Represents an amount lower than $1.