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

3 Months Ended

Mar. 31, 2017

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 March 31, 2017:

		Options Outstanding and Exercisable (1)
Exercise Prices		Number			Weighted Average Price
$30.06		26,114			$	30.06
$75.17		26,752			75.17
$80.89 - $85.05		27,476			82.84
Total options		80,342			$	63.13

(1) The aggregate intrinsic value of options outstanding and exercisable at March 31, 2017 was $1.5 million. The aggregate intrinsic value was calculated as the excess, if any, between our closing share price of $80.46 per share on March 31, 2017 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 three months ended March 31, 2017:

	Three Months Ended March 31, 2017
Weighted average fair value of options granted	5.25
Expected volatility	18.9%
Risk-free interest rate	1.3%
Expected dividend yield	5.5%
Expected life	2 years

Summary of Share Incentive Plans

The following table summarizes activity under our share incentive plans for the three months ended March 31, 2017:

	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, 2016	105,066			$	48.27			604,487			$	71.03
Granted	14,622			80.89				205,439			83.55
Exercised/Vested	(39,346	)		30.06				(299,368	)		71.68
Forfeited	—			—				(3,199	)		71.95
Total options and nonvested share awards outstanding at March 31, 2017	80,342			$	63.13			507,359			$	75.71

Summary of non-qualified deferred compensation share award activity

The following table summarizes the eligible share award activity for the three months ended March 31, 2017:

(in thousands)		Three Months Ended March 31, 2017
Temporary equity:
Balance at December 31, 2016		$	77,037
Change in classification		4,234
Change in redemption value		(3,925		)
Diversification of share awards		(1,642		)
Balance at March 31, 2017		$	75,704

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and aggregate intrinsic value.

+ References

No definition available.

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Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value.

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Tabular disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (27)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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