Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Summary Of Stock Option Activity

Stock option activity for the six months ended June 30, 2012 is summarized below:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2011		6,303,732		$	24.76
Options granted in 2012		0		$	0.00
Exercised in 2012		(171,080	)	$	21.21
Cancelled/forfeited/expired in 2012		(39,675	)	$	27.57
Outstanding at June 30, 2012		6,092,977		$	24.84		2.20	$	55,946,657
Exercisable at June 30, 2012		5,644,977		$	25.19		1.94	$	49,835,937
Vested or expected to vest in the future as of June 30, 2012		6,092,663		$	24.84		2.20	$	55,942,379

Summary Of Restricted Stock Activity

The following table summarizes information about restricted stock activity for the six months ended June 30, 2012:

	Shares			Weighted- Average Grant Date Fair Value Per Share
Unvested at December 31, 2011		2,542,989		$	21.67
Granted		1,113,500		$	25.46
Vested		(144,966	)	$	26.01
Forfeited		(30,424	)	$	24.06
Unvested at June 30, 2012		3,481,099		$	22.68