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Commitments and Contingencies - Additional Information (Detail) (Indemnification Obligation [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
Indemnification Obligation [Member]
Loss Contingencies [Line Items]
Indemnification Obligations, liabilities	$ 0us-gaap_LossContingencyAccrualAtCarryingValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_IndemnificationGuaranteeMember	$ 0us-gaap_LossContingencyAccrualAtCarryingValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_IndemnificationGuaranteeMember

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- Definition

Amount of loss contingency liability.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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