Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Period Type:	duration

- Definition

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

+ 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 (d)(1)

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

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Balance Type:	na
Period Type:	duration

- Definition

Number of share instruments newly issued under a share-based compensation 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

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

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Stock-Based Compensation - Additional Information (Details) (Restricted Stock, USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	0 Months Ended	12 Months Ended
	Mar. 31, 2015	Nov. 21, 2013	Sep. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense	$ 11.5
Expected period for recognition of unrecognized compensation expense	2 years 8 months 12 days
1997 Key Employee Stock Option Plan Member
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares issued		184,000
Fair value of the Company’s common stock on the date of grant		$ 98.68
Unrecognized compensation expense		$ 17.3
Expected period for recognition of unrecognized compensation expense		4 years
2014 Long Term Incentive Plan Member
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted shares issued	3,000		13,000
Fair value of the Company’s common stock on the date of grant	$ 19.13		$ 45.68