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Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Apr. 30, 2015	Sep. 30, 2014
Equity [Abstract]
Shares approved to repurchase		1,000,000
Shares purchased	1,363,333		790,900
Aggregate purchase price	$ 26,292		$ 15,810

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- References

No definition available.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.28,29)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 02



-Paragraph 29, 30



-Article 5

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 30



-Section 50



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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