STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (accumulated deficit)
Beginning balance at Dec. 31, 2010	$ 168,468	$ 23	$ 176,838		$ 317	$ (8,710)
Beginning balance (in shares) at Dec. 31, 2010		22,524,449
Net income	18,562					18,562
Other comprehensive income (loss)	(1,218)				(1,218)
Equity-based compensation	5,158		5,158
Tax benefit related to exercise of stock options	1,290		1,290
Issuance of Common Stock upon exercise of stock-based awards, (in shares)		1,019,297
Issuance of Common Stock upon exercise of stock-based awards	8,660	1	8,659
Purchase of Treasury Stock, (in shares)	0
Ending balance at Dec. 31, 2011	200,920	24	191,945		(901)	9,852
Ending balance (in shares) at Dec. 31, 2011		23,543,746
Net income	13,685					13,685
Other comprehensive income (loss)	1,261				1,261
Equity-based compensation	5,083		5,083
Tax benefit related to exercise of stock options	672		672
Issuance of Common Stock upon exercise of stock-based awards, (in shares)		51,414
Issuance of Common Stock upon exercise of stock-based awards	795		795
Purchase of Treasury Stock, (in shares)	(1,482,548)	(1,482,548)
Purchase of Treasury Stock	(27,168)	(2)		(27,166)
Issuance of Treasury Stock upon exercise of stock-based awards (in shares)		74,755
Issuance of Treasury Stock upon exercise of stock-based awards	820			1,472		(652)
Accumulated other comprehensive income (loss), net	360
Ending balance at Dec. 31, 2012	196,068	22	198,495	(25,694)	360	22,885
Ending balance (in shares) at Dec. 31, 2012		22,187,367
Net income	6,685					6,685
Other comprehensive income (loss)	(441)				(441)
Equity-based compensation	5,920		5,920
Purchase of Treasury Stock, (in shares)	(1,257,004)	(1,257,004)
Purchase of Treasury Stock	(19,816)	(1)		(19,815)
Issuance of Treasury Stock upon exercise of stock-based awards (in shares)		251,367
Issuance of Treasury Stock upon exercise of stock-based awards	2,479			4,504		(2,025)
Accumulated unrealized loss from available-for-sale securities, net of taxes					(65)
Accumulated unrealized loss from hedging activities, net of taxes					(16)
Accumulated other comprehensive income (loss), net	(81)				(81)
Ending balance at Dec. 31, 2013	$ 190,895	$ 21	$ 204,415	$ (41,005)	$ (81)	$ 27,545
Ending balance (in shares) at Dec. 31, 2013		21,181,730