Stock Repurchase (Tables)

12 Months Ended

Dec. 31, 2015

Class of Stock Disclosures [Abstract]

Shares Repurchased

The following table shows the shares repurchased during the periods indicated:

Period in 2015	Number of Shares  Purchased	Average Price Paid Per Share		Total Number of  Shares Purchased as Part of Publicly Announced Programs
January	529,100	$	65.51	529,100
February	120,000	61.07		120,000
March	645,000	61.50		645,000
April	640,000	61.20		640,000
May	472,000	64.89		472,000
June	482,586	67.19		482,586
July	303,807	70.98		303,807
August	67,436	73.67		67,436
September	—	—		—
October	924,960	80.26		924,960
November	—	—		—
December	—	—		—
Total	4,184,889	$	68.02	4,184,889