Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Schedule Of Assumptions Used To Estimate The Fair Value Of Stock Options

	For the year ended December 31,
	2011	2010	2009
Risk free interest rate	0.66% - 2.17%	1.35% - 1.83%	1.30% - 1.92%
Dividend yield	0.0%	0.0%	0.0%
Expected volatility	53.9%	55.2%	55.7%
Expected lives	3.5 - 4.5 years	3.6 - 4.3 years	3.2 - 4.1 years

Company's Activities With Respect To Its Stock Options

	Number of Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Life (in years)		Aggregate Intrinsic  Value (in thousands)
Outstanding at December 31, 2008		3,786		$	20.33
Granted		1,157		$	20.26
Exercised		(659	)	$	9.69
Canceled		(88	)	$	30.43
Outstanding at December 31, 2009		4,196		$	21.77
Granted		539		$	35.64
Exercised		(889	)	$	17.01
Canceled		(60	)	$	26.71
Outstanding at December 31, 2010		3,786		$	24.78
Granted		578		$	41.91
Exercised		(704	)	$	21.53
Canceled		(52	)	$	32.07
Outstanding at December 31, 2011		3,608		$	28.06		4.1	$	53,772
Exercisable at December 31, 2011		1,968		$	24.32		3.4	$	36,682
Unvested at December 31, 2011		1,640		$	32.54		5.1	$	17,090

Additional Information Regarding Options Outstanding And Exercisable

	Options Outstanding						Options Exercisable
Range	Outstanding (in thousands)		Weighted Average Contractual Life (in years)		Weighted Average Exercise Price		Exercisable (in thousands)		Weighted Average Exercise Price
$  0.00 - $  5.25		102		1.9	$	3.61		102	$	3.61
$  5.26 - $10.50		125		3.0	$	8.54		125	$	8.54
$10.51 - $21.00		1,107		4.1	$	19.44		625	$	19.25
$21.01 - $31.50		592		3.0	$	28.25		543	$	28.32
$31.51 - $47.25		1,682		4.8	$	36.61		573	$	33.20
		3,608						1,968

Activity Of Options Outstanding That Had Not Yet Vested

	Number of Shares			Weighted- Average Fair Value Per Share
Unvested as of December 31, 2010		1,924		$	11.35
Shares granted		578		$	18.53
Vesting during period		(819	)	$	11.03
Forfeited or canceled		(43	)	$	12.95
Unvested as of December 31, 2011		1,640		$	14.00

Company's Restricted Stock Unit Activity

	Number of Units			Weighted- Average Grant Date Fair Value per share
	(in thousands)
Outstanding at December 31, 2010		130		$	35.58
Granted		136		$	41.66
Vested		(35	)	$	35.52
Forfeited/canceled		(5	)	$	37.38
Outstanding at December 31, 2011		226		$	39.22

Schedule Of Non-Cash Compensation Expense

	For the year ended December 31,
	2011		2010		2009
	(in thousands, except per share amounts)
Cost of revenues	$	187	$	189	$	192
Selling, general and administrative		11,282		10,312		8,008
Total cost of non-cash compensation included in loss before provision for income taxes		11,469		10,501		8,200
Amount of income tax recognized in earnings		—		—		—
Amount charged against loss	$	11,469	$	10,501	$	8,200