Stock-Based Compensation (Assumptions Used To Value Option Grants and Stock Awards (Details)	3 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended
Sep. 30, 2012 Employee Stock Option [Member]	Sep. 30, 2013 Employee Stock Option [Member]	Sep. 30, 2012 Employee Stock Option [Member]	Sep. 30, 2012 Employee Stock Option [Member] Minimum [Member]	Sep. 30, 2012 Employee Stock Option [Member] Maximum [Member]	Mar. 31, 2013 Non-Vested Stock Unit Awards [Member]	Mar. 31, 2012 Non-Vested Stock Unit Awards [Member]	Sep. 30, 2013 Non-Vested Stock Unit Awards [Member]	Mar. 31, 2013 Non-Vested Stock Unit Awards [Member] Minimum [Member]	Mar. 31, 2012 Non-Vested Stock Unit Awards [Member] Minimum [Member]	Mar. 31, 2013 Non-Vested Stock Unit Awards [Member] Maximum [Member]	Mar. 31, 2012 Non-Vested Stock Unit Awards [Member] Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility factor	43.00%	39.00%		38.00%	43.00%				16.00%	21.00%	42.00%	39.00%
Approximate risk free interest rate	0.52%	0.44%		0.52%	0.68%	0.33%	0.47%
Expected term (in years)	3 years 10 months 28 days	3 years 4 months 6 days	3 years 10 months 28 days					2 years 9 months
Expected dividend yield	0.00%	0.00%	0.00%			0.00%	0.00%

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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)

-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)

-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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- 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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