Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Share-Based Compensation [Line Items]

Schedule Of Information With Respect To Outstanding And Exercisable Stock Options

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number of Options Outstanding		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in Years)		Number Exercisable		Weighted Average Exercise Price
$13.32    $13.32		442,200	$	13.32		2.46		412,325	$	13.32
$13.67    $21.80		474,938	$	19.65		7.01		261,619	$	18.00
$22.04    $22.13		393,950	$	22.07		6.02		309,950	$	22.06
$23.32    $29.02		500,147	$	27.46		5.16		294,827	$	26.95
$29.35    $29.73		471,300	$	29.56		1.14		471,300	$	29.56
$30.67    $32.91		350,500	$	30.88		6.18		294,500	$	30.92
$33.04    $34.70		438,502	$	34.42		3.95		438,502	$	34.42
$34.86    $62.56		273,800	$	55.35		2.56		273,800	$	55.35
$64.12    $64.12		5,000	$	64.12		2.30		5,000	$	64.12
$68.24    $68.24		3,125	$	68.24		2.43		3,125	$	68.24
		3,353,462	$	27.79		4.33		2,764,948	$	28.50

Schedule Of Fair Value Of Stock Option Award Granted Estimated On Date Of Grant Using The Black-Scholes-Merton Option Pricing Model

	For the Year Ended December 31,
	2011			2010			2009
Dividend yield		—			—			—
Risk-free interest rate		2.2	%		2.5	%		2.2	%
Weighted average volatility		53.3	%		52.4	%		55.0	%
Expected life (in years)		5.5			5.8			6.5
Weighted average grant date fair value per share of options granted	$	10.89		$	14.95		$	13.48

Employee Stock Option [Member]

Share-Based Compensation [Line Items]

Summary Of Stock Option Activity

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2008		2,915,634		$	29.29
Granted		569,231			24.76
Exercised		(57,360	)		12.05			$	695
Forfeited		(53,521	)		26.32
Cancelled		(160,882	)		40.24
Outstanding as of December 31, 2009		3,213,102		$	28.30
Granted		626,664			29.53
Exercised		(51,528	)		14.87			$	651
Forfeited		(84,779	)		27.07
Cancelled		(128,845	)		40.70
Outstanding as of December 31, 2010		3,574,614		$	28.29
Granted		565,720			21.87
Exercised		(141,625	)		14.60			$	1,112
Forfeited		(456,459	)		24.69
Cancelled		(188,788	)		36.94
Outstanding as of December 31, 2011		3,353,462		$	27.79		4.3 years	$	—
Exercisable as of December 31, 2011		2,764,948		$	28.50		3.4 years	$	—

Restricted Stock [Member]

Share-Based Compensation [Line Items]

Schedule Of Information With Respect To Outstanding Shares Of Restricted Stock

	Number of Shares			Weighted Average Grant-Date Fair Value Per Share
Outstanding as of December 31, 2008		1,404,428		$	18.79
Granted		726,247			25.77
Vested		(207,665	)		26.96
Forfeited		(214,658	)		21.20
Outstanding as of December 31, 2009		1,708,352		$	20.46
Granted		1,037,218			28.96
Vested		(283,932	)		27.58
Forfeited		(273,002	)		23.68
Outstanding as of December 31, 2010		2,188,636		$	23.17
Granted		1,266,170			21.83
Vested		(816,017	)		15.55
Forfeited		(842,042	)		25.19
Outstanding as of December 31, 2011		1,796,747		$	24.74