Stock Incentive Plans and Stock Purchase Plans (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Weighted Average Grant-Date Fair Values

The activity related to the Company’s restricted and deferred stock awards and the corresponding weighted average grant-date fair values for the year ended December 31, 2015 are as follows:

	Number of Shares			Weighted Average Fair Value
Non-vested shares at January 1, 2015		1,271,044		$	46.80
Awarded		483,423		$	70.44
Forfeited		(29,974	)	$	55.77
Vested		(710,702	)	$	44.43
Non-vested shares at December 31, 2015		1,013,791		$	61.50

Schedule of Activity and Certain Other Information Related to Stock Option Awards

The activity and certain other information related to the Company’s outstanding stock option awards for the year ended December 31, 2015 are as follows:

	Number  of Stock Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in millions)
Outstanding at January 1, 2015		814,094		$	27.57
Exercised		(228,707	)	$	26.58			$	11.3
Outstanding and exercisable at December 31, 2015		585,387		$	27.96		2.7	$	25.6