Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Stock-Based Compensation

Summary Of Stock Option Activity

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2010		6,912,014		$	24.51
Options granted in 2011		0			—
Exercised in 2011		(163,932	)	$	26.47
Cancelled/forfeited/expired in 2011		(3,100	)	$	26.89
Outstanding at June 30, 2011		6,744,982		$	24.46		2.94	$	32,436,018
Exercisable at June 30, 2011		5,848,982		$	25.09		2.40	$	24,470,578
Vested or expected to vest in the future as of June 30, 2011		6,743,459		$	24.46		2.94	$	32,422,477

Summary Of Restricted Stock Activity

	Shares			Weighted- Average Grant Date Fair Value Per Share
Unvested at December 31, 2010		2,684,250		$	21.79
Granted		20,000		$	28.88
Vested		(179,225	)	$	26.33
Forfeited		(7,950	)	$	24.45
Unvested at June 30, 2011		2,517,075		$	21.51