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Basis of Presentation and New Accounting Pronouncements - Additional Information (Detail)	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Equity method ownership percentage in joint venture	37.50%us-gaap_EquityMethodInvestmentOwnershipPercentage
Direct ownership percentage in joint venture	75.00%us-gaap_MinorityInterestOwnershipPercentageByParent

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Details

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