Stockholders' Equity And Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity And Stock-Based Compensation [Abstract]

Schedule Of Stock Option Plans

				Weighted
	Number of			average
	shares under			exercise
	option			price
Outstanding at December 31, 2008	6,408,850		$	17.31
Exercised	(569,445	)	$	10.27
Canceled	(272,151	)	$	17.87
Granted	0			0
Outstanding at December 31, 2009	5,567,254		$	17.95
Exercised	(2,291,757	)	$	17.55
Canceled	(941,049	)	$	20.93
Granted	0			0
Outstanding at December 31, 2010	2,334,448		$	17.15
Exercised	(932,895	)	$	29.31
Canceled	(84,337	)	$	16.23
Granted	0			0
Outstanding at December 31, 2011	1,317,216		$	18.07

Schedule Of Options Exercisable

Options exercisable at December 31:
2009	5,240,361	$	17.96
2010	2,138,886	$	17.07
2011	1,270,775	$	18.06

Schedule Of Options Outstanding And Exercisable By Price Range

			Outstanding and Exercisable by Price Range as of December 31, 2011
			Options Outstanding			Options Exercisable
		Number outstanding as	Weighted average		Weighted average	Number exercisable		Weighted average
	Range of Exercise prices	of 12/31/2011	remaining contractual life		exercise price	as of 12/31/2011		exercise price
$	10.72– $15.09	344,972	1.90	$	13.87	330,907	$	13.84
$	15.09– $19.69	215,971	1.42	$	18.20	215,137	$	18.19
$	19.69– $21.67	756,273	2.23	$	19.95	724,731	$	19.95
$	10.72– $21.67	1,317,216	2.01	$	18.07	1,270,775	$	18.06

Schedule Of Restricted Stock Plans

			RSUs
					Weighted Average
	Number of RSUs				Grant Price
Balance at December 31, 2008	3,247,842			$	17.99
Granted	906,124			$	14.53
Earned	(610,734	)		$	14.69
Canceled	(86,581	)		$	18.59
Balance at December 31, 2009	3,456,651			$	17.65
Granted	294,030			$	22.60
Earned	(680,188	)		$	23.05
Canceled	(74,196	)		$	18.47
Balance at December 31, 2010	2,996,297			$	17.97
Granted	1,370,666			$	30.14
Earned	(860,598	)		$	30.30
Canceled	(84,843	)		$	20.82
Balance at December 31, 2011	3,421,522			$	22.75

Schedule Of Employee Stock Purchase Plan

	2011		2010		2009
Dividend expense yield	0.4	%	0.4	%	0.5	%
Expected life	3 months		3 months		3 months
Expected volatility	44	%	25	%	45	%
Risk-free interest rate	0.1	%	0.1	%	0.8	%

Schedule Of Weighted Average Grant Date Fair Value Of Purchase Rights Granted Under Employee Stock Purchase Plan

			Weighted
	Number		average
	of shares		fair value
2009	1,257,804	$	3.83
2010	1,011,765	$	4.35
2011	940,703	$	6.56