Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]		Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2013	$ 22	$ 350,494		$ (118,749)	$ (83,535)	$ (821)	$ 147,411
Balance-shares (in Shares) at Dec. 31, 2013	22,350,000
Net income					873		873
Change in accumulated other comprehensive income						(612)	(612)
Purchase of treasury stock	$ (1)			(12,483)			(12,484)
Purchase of treasury stock (in Shares)	(1,414,000)
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan	$ 1			3,031	(1,309)		1,723
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	311,000
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors			[1]	2,872	(2,358)		514
Equity-based compensation		$ 4,200					4,200
Balance-ending at Sep. 30, 2014	$ 22	354,694		(125,329)	(86,329)	(1,433)	141,625
Balance-shares-ending (in Shares) at Sep. 30, 2014	21,540,000
Balance at Jun. 30, 2014	$ 22	$ 353,398		(122,713)	(86,092)	(609)	144,006
Balance-shares (in Shares) at Jun. 30, 2014	21,843,000
Net income					773		773
Change in accumulated other comprehensive income						(824)	(824)
Purchase of treasury stock	$ (1)			(4,588)			(4,589)
Purchase of treasury stock (in Shares)	(505,000)
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan	$ 1			1,217	(329)		889
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	124,000
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors			[1]	755	(681)		74
Equity-based compensation		$ 1,296					1,296
Balance-ending at Sep. 30, 2014	$ 22	354,694		(125,329)	(86,329)	(1,433)	141,625
Balance-shares-ending (in Shares) at Sep. 30, 2014	21,540,000
Balance at Dec. 31, 2014	$ 22	$ 355,906		(122,387)	(85,352)	(1,566)	146,623
Balance-shares (in Shares) at Dec. 31, 2014	21,843,000
Net income					1,670		1,670
Change in accumulated other comprehensive income						756	756
Purchase of treasury stock	$ (1)			(11,259)			$ (11,260)
Purchase of treasury stock (in Shares)	(1,090,000)						1,089,909
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan			[1]	2,269	(500)		$ 1,769
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors	$ 1	$ 26		6,855	(5,744)		1,138
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors (in Shares)	705,000
Equity-based compensation		3,925					3,925
Balance-ending at Sep. 30, 2015	$ 22	359,857		(124,522)	(89,926)	(810)	144,621
Balance-shares-ending (in Shares) at Sep. 30, 2015	21,693,000
Balance at Jun. 30, 2015	$ 22	$ 358,596		(121,929)	(88,677)	(930)	147,082
Balance-shares (in Shares) at Jun. 30, 2015	21,995,000
Net income					167		167
Change in accumulated other comprehensive income						120	120
Purchase of treasury stock			[1]	(4,912)			(4,912)
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan			[1]	1,141	(238)		903
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors			[1]	1,178	(1,178)
Equity-based compensation		$ 1,261					1,261
Balance-ending at Sep. 30, 2015	$ 22	$ 359,857		$ (124,522)	$ (89,926)	$ (810)	$ 144,621
Balance-shares-ending (in Shares) at Sep. 30, 2015	21,693,000

[1] Represents an amount lower than $1.