Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Fair Value Assumptions

The following table summarizes the assumptions we used for the six months ended June 30, 2015 and 2014:

	For the Six Months Ended June 30,
	2015		2014
Risk-free rate of return		1.70%		1.64%
Expected dividend yields		1.57%		1.55%
Expected award life (years)		4.62	4.71
Expected volatility		21.10%		23.41%

Summary of Restricted Share Activity

A summary of restricted share activity as of June 30, 2015 and changes during the six months then ended is as follows:

	Shares			Weighted-Average Grant Date Fair Value
Outstanding at January 1, 2015		313,716		$	31.38
Granted		297,873		$	39.21
Vested and issued		(118,882	)	$	26.78
Expired or forfeited		(8,938	)	$	41.76
Outstanding at June 30, 2015		483,769		$	37.14

Summary of Stock-Settled SARs Activity

A summary of stock-settled SARs activity as of June 30, 2015 and changes during the six months then ended is as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2015		1,313,726		$	28.57
Granted		243,305		$	39.43
Exercised		(78,022	)	$	26.26
Expired or forfeited		(7,231	)	$	31.68
Outstanding at June 30, 2015		1,471,778		$	29.67

Summary of Cash-Settled SARs Activity

A summary of cash-settled SARs activity as of June 30, 2015 and changes during the six months then ended is as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2015		2,001,451		$	32.76
Granted		913,157		$	47.48
Exercised		(306,278	)	$	29.22
Expired or forfeited		(91,932	)	$	37.22
Outstanding at June 30, 2015		2,516,398		$	38.37