Share Based Awards (Details 3)	3 Months Ended	9 Months Ended
Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Schedule of Performance Based Awards Under Incentive plan
Expected life (in years)		4 years 9 months 18 days	4 years 10 months 24 days
Expected volatility, minimum		36.40%	43.40%
Expected volatility, maximum		36.60%	43.70%
Risk-free rate		1.70%
Risk-free rate, minimum			1.00%
Risk-free rate, maximum	1.50%
Minimum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		4.30%	3.10%
Maximum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		4.40%	3.90%
Performance Based Award [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected life (in years)		4 years 9 months 18 days	4 years 10 months 24 days
Expected volatility, minimum		36.20%	37.70%
Expected volatility, maximum		36.50%	43.50%
Risk-free rate, minimum		1.60%
Risk-free rate, maximum		1.80%
Performance Based Award [Member] \| Minimum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		4.30%	3.20%
Risk-free rate	1.40%
Performance Based Award [Member] \| Maximum [Member]
Schedule of Performance Based Awards Under Incentive plan
Expected dividends		5.00%	3.70%
Risk-free rate	1.80%

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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)

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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)

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

Reference 2: 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=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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The estimated measure of the maximum 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

No definition available.

+ Details

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The estimated measure of the minimum 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

No definition available.

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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

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

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