Represents the vest percent of participant's assigned award opportunity during the reporting period.

No definition available.

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- Definition

Represents the number of equal installments commencing one year from date of grant over which the stock options vest.

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of options and stock-settled appreciation rights granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

No definition available.

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- Definition

The quantity of shares issuable on stock options and stock-settled appreciation rights granted during the reporting period.

+ References

No definition available.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- References

No definition available.

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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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (a)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.D.2)
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-Publisher FASB
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section D
-Subsection 2

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Stock-Based Compensation Programs (Details)	1 Months Ended		3 Months Ended		12 Months Ended
Stock-Based Compensation Programs (Details)	Jan. 31, 2016 shares	Feb. 28, 2015	Mar. 31, 2016 installment $ / shares	Mar. 31, 2015 shares	Dec. 31, 2015 $ / shares
Stock option and SSARs
Stock-Based Compensation Programs
Number of equal installments commencing one year from the date of grant \| installment			4
Vesting period			1 year
Expiration period of options			10 years
Granted (in shares)	1,000,000
Weighted average fair value at grant date (in dollars per share) \| $ / shares			$ 18.58		$ 14.20
Weighted average assumptions used in estimation of fair values of options
Expected dividend yield (as a percent)	0.79%	0.79%
Expected stock price volatility (as a percent)	29.25%	22.11%
Risk-free interest rate (as a percent)	1.57%	1.39%
Expected life of options	5 years 11 months 9 days	5 years 10 months 6 days
PCEQs
Stock-Based Compensation Programs
Vesting period			3 years
Granted (in shares)	118,755			116,559
PCEQs \| Minimum
Weighted average assumptions used in estimation of fair values of options
Vest range of participant's assigned award opportunity (as a percent)	0.00%			0.00%
PCEQs \| Maximum
Weighted average assumptions used in estimation of fair values of options
Vest range of participant's assigned award opportunity (as a percent)	200.00%			200.00%