Employee Benefit and Equity Plans (Tables)

6 Months Ended

Jun. 30, 2011

Employee Benefit and Equity Plans [Abstract]

Stock option and SARs activities

				Weighted
				Average
	Shares			Exercise Price
Outstanding at December 31, 2010		6,461,839		$	37.20
Granted		841,620			51.15
Exercised		(1,507,274	)		27.00
Expired/forfeited		(193,940	)		54.31
Outstanding at June 30, 2011		5,602,245		$	41.44

Non-vested restricted stock units outstanding

				Weighted
				Average
				Grant Date
	Shares			Fair Value
Non-vested restricted stock units outstanding at December 31, 2010		—		$	—
Granted		329,399			49.46
Vested		(36,995	)		49.22
Expired/forfeited		(8,472	)		49.18
Non-vested restricted stock units outstanding at June 30, 2011		283,932		$	49.50

Non-vested restricted stock outstanding

				Weighted
				Average Grant
	Shares			Date Fair Value
Non-vested restricted stock outstanding at December 31, 2010		582,751		$	44.81
Granted		349,480			51.16
Vested		(213,929	)		46.83
Forfeited		(21,176	)		44.87
Non-vested restricted stock outstanding at June 30, 2011		697,126		$	47.37