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Earnings Per Share - Additional Information (Detail) (USD $)	3 Months Ended
	Jun. 30, 2013
Earnings Per Share [Abstract]
Options to purchase common stock, Shares	100,000
Options to purchase common stock, Per Share	$ 16.73

X

- Definition

Dilutive effect of securities options to purchase common stock per share.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
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Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Warrant

-URI http://asc.fasb.org/extlink&oid=6528364



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 23

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1757-109256



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Treasury Stock Method

-URI http://asc.fasb.org/extlink&oid=6527216



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Call Option

-URI http://asc.fasb.org/extlink&oid=6506649

+ Details

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Data Type:	xbrli:sharesItemType
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