Share-based Compensation and Non-Qualified Deferred Compensation Plan (Tables)

9 Months Ended

Sep. 30, 2016

Share-based Compensation [Abstract]

Schedule of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range And Intrinsic Value

The following table summarizes outstanding share options, all of which were exercisable, at September 30, 2016:

	Options Outstanding and Exercisable (1)
Exercise Prices	Number	Weighted Average Price
$30.06	65,460
$75.17	26,752
$85.05	12,854
Total options	105,066	$	48.27

(1) The aggregate intrinsic value of options outstanding and exercisable at September 30, 2016 was $3.7 million. The aggregate intrinsic value was calculated as the excess, if any, between our closing share price of $83.74 per share on September 30, 2016 and the strike price of the underlying award.

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The following assumptions were used for the reload options granted during the nine months ended September 30, 2016:

	Nine Months Ended September 30, 2016
Weighted average fair value of options granted	$6.71
Expected volatility	18.0%
Risk-free interest rate	0.9%
Expected dividend yield	3.8%
Expected life	3 years

Summary of Share Incentive Plans

The following table summarizes activity under our share incentive plans for the nine months ended September 30, 2016:

	Options Outstanding		Weighted Average Exercise / Grant Price		Nonvested Share Awards Outstanding		Weighted Average Exercise /  Grant Price
Options and nonvested share awards outstanding at December 31, 2015	295,205		$	42.49	750,246		$	68.09
Granted	12,854		85.05		269,728		74.90
Exercised/Vested	(202,993	)	42.19		(332,806	)	67.82
Forfeited	—		—		(15,473	)	70.65
Total options and nonvested share awards outstanding at September 30, 2016	105,066		$	48.27	671,695		$	70.90

Summary of non-qualified deferred compensation share award activity

The following table summarizes the eligible share award activity for the nine months ended September 30, 2016:

($ and shares in thousands)	Nine Months Ended September 30, 2016
Temporary equity:
Balance at December 31, 2015	$	79,364
Change in classification	10,110
Change in redemption value	8,154
Diversification of share awards (297 shares)	(25,406		)
Balance at September 30, 2016	$	72,222