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

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.

+ Details

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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

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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

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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

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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

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- Definition

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

+ References

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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

Percentage of vesting of share-based compensation awards.

+ References

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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

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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 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: 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)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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Stock-Based Compensation Programs (Details)		1 Months Ended		3 Months Ended
Stock-Based Compensation Programs (Details)	May 16, 2017	Jan. 31, 2018 $ / shares shares	Jan. 31, 2017 $ / shares	Mar. 31, 2018 installment shares	Mar. 31, 2017 shares
Stock-Based Compensation Programs
Stock split ratio	2
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)		2,100,000
Weighted average fair value at grant date (in dollars per share) \| $ / shares		$ 9.07	$ 8.54
Weighted average assumptions used in estimation of fair values of options
Expected dividend yield (as a percent)		1.03%	0.68%
Expected stock price volatility (as a percent)		21.98%	20.49%
Risk-free interest rate (as a percent)		2.47%	2.07%
Expected life of options		6 years 1 month 6 days	5 years 11 months 9 days
PCEQs
Stock-Based Compensation Programs
Vesting period				3 years
Weighted average assumptions used in estimation of fair values of options
Granted (in shares)				261,174	237,452
PCEQs \| Minimum
Weighted average assumptions used in estimation of fair values of options
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date				0.00%	0.00%
PCEQs \| Maximum
Weighted average assumptions used in estimation of fair values of options
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date				200.00%	200.00%
PCEQs \| Special Acquisition Related Incentive Plan
Stock-Based Compensation Programs
Granted (in shares)					1,100,000
PCEQs \| Special Acquisition Related Incentive Plan \| Minimum
Weighted average assumptions used in estimation of fair values of options
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date					0.00%
PCEQs \| Special Acquisition Related Incentive Plan \| Maximum
Weighted average assumptions used in estimation of fair values of options
Percent of participant PCEQ award assigned that determines the number of shares available at vesting date					200.00%