ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValue

No definition available.

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- Definition

ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageofTotalAward

+ References

No definition available.

+ Details

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ 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 (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ 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 (c)(2)(iii)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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 (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ 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 (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ 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 (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ 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 (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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)(iv)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Share-Based Compensation Plan (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	0 Months Ended
	Mar. 31, 2015	Feb. 08, 2012	Jan. 30, 2013	Dec. 13, 2013	Feb. 04, 2014	Feb. 11, 2015
Restricted Stock [Member]
Summary of restricted share activity
Unvested shares, Beginning balance	129,988
Unvested shares, Granted	40,507
Vested, shares	(50,827)
Forfeited, shares	(65)
Unvested shares, Ending balance	119,603
Unvested weighted average grant date fair value, beginning balance	$ 27.17
Granted, weighted average grant date fair value	$ 48.87
Vested, weighted average grant date fair value	$ 25.70
Forfeited, weighted average grant date fair value	$ 28.38
Unvested weighted average grant date fair value, ending balance	$ 35.15
February 2012 [Member] \| Performance Shares [Member]
Summary of restricted share activity
Unvested shares, Granted		72,056
February 2012 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award		30.00%
Grant Date Fair Value by Component ($ in millions)		0.7
Volatility		33.00%
Interest Rate		0.34%
Dividend Yield		2.20%
February 2012 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award		30.00%
Grant Date Fair Value by Component ($ in millions)		0.6
Volatility		33.00%
Interest Rate		0.34%
Dividend Yield		2.20%
February 2012 [Member] \| EBITDA Comparison [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award		40.00%
Grant Date Fair Value by Component ($ in millions)		0.7
Volatility		33.00%
Interest Rate		0.34%
Dividend Yield		2.20%
January 2013 [Member] \| Performance Shares [Member]
Summary of restricted share activity
Unvested shares, Granted			72,118
January 2013 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award			30.00%
Grant Date Fair Value by Component ($ in millions)			0.7
Volatility			31.00%
Interest Rate			0.41%
Dividend Yield			2.20%
January 2013 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award			30.00%
Grant Date Fair Value by Component ($ in millions)			0.5
Volatility			31.00%
Interest Rate			0.41%
Dividend Yield			2.20%
January 2013 [Member] \| EBITDA Comparison [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award			40.00%
Grant Date Fair Value by Component ($ in millions)			0.7
Volatility			31.00%
Interest Rate			0.41%
Dividend Yield			2.20%
December 2013 [Member] \| Performance Shares [Member]
Summary of restricted share activity
Unvested shares, Granted				252,088
December 2013 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award				50.00%
Grant Date Fair Value by Component ($ in millions)				4.7
Volatility				29.00%
Dividend Yield				2.40%
December 2013 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award				50.00%
Grant Date Fair Value by Component ($ in millions)				2.9
Volatility				29.00%
Dividend Yield				2.40%
February 2014 [Member] \| Performance Shares [Member]
Summary of restricted share activity
Unvested shares, Granted					66,483
February 2014 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award					30.00%
Grant Date Fair Value by Component ($ in millions)					0.7
Volatility					29.00%
Interest Rate					0.62%
Dividend Yield					2.40%
February 2014 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award					30.00%
Grant Date Fair Value by Component ($ in millions)					0.5
Volatility					29.00%
Interest Rate					0.62%
Dividend Yield					2.40%
February 2014 [Member] \| EBITDA Comparison [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award					40.00%
Grant Date Fair Value by Component ($ in millions)					0.8
Volatility					29.00%
Interest Rate					0.62%
Dividend Yield					2.40%
February 2015 [Member] \| Performance Shares [Member]
Summary of restricted share activity
Unvested shares, Granted						44,962
February 2015 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award						30.00%
Grant Date Fair Value by Component ($ in millions)						0.9
Volatility						22.00%
Interest Rate						1.02%
Dividend Yield						2.50%
February 2015 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award						40.00%
Grant Date Fair Value by Component ($ in millions)						0.7
Volatility						22.00%
Interest Rate						1.02%
Dividend Yield						2.50%
February 2015 [Member] \| EBITDA Comparison [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Percentage of Total Award						30.00%
Grant Date Fair Value by Component ($ in millions)						0.7
Volatility						22.00%
Interest Rate						1.02%
Dividend Yield						2.50%
Minimum [Member] \| December 2013 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Interest Rate				0.34%
Minimum [Member] \| December 2013 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Interest Rate				0.34%
Maximum [Member] \| December 2013 [Member] \| Relative TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Interest Rate				2.25%
Maximum [Member] \| December 2013 [Member] \| Absolute TSR [Member] \| Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Interest Rate				2.25%