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Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - 6.625% Senior Notes Due December 2016 [Member] $ in Millions	Nov. 02, 2015 USD ($)
Subsequent Event [Line Items]
Principal amount of senior notes	$ 50.0
Senior notes, rate	6.625%
Redemption price (expressed as percentage of the principal amount)	101.65625%
Expected redemption premium and write-off unamortized issuance costs	$ 1.1
Debt instrument redemption, expected to decrease in annual interest expense	$ 2.0

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- Definition

Debt instrument redemption, expected to decrease in annual interest expense.

+ References

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- Definition

Expected redemption premium and write-off of unamortized issuance costs.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 835



-SubTopic 30



-Section 55



-Paragraph 8



-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400



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-Publisher FASB



-Name Accounting Standards Codification



-Topic 835



-SubTopic 30



-Section 45



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))



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

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 470



-Section 50



-Paragraph 3



-Subparagraph e



-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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