States the date the complaint was formally filed in a court of law, in arbitration or mediation.

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Subsequent Events - Additional Information (Detail) - Subsequent Event	Oct. 23, 2015	Sep. 28, 2015
Class Action Lawsuit [Member]
Subsequent Event [Line Items]
Lawsuit Filing Date		September 28, 2015
Shareholder Derivative Lawsuit [Member]
Subsequent Event [Line Items]
Lawsuit Filing Date	October 23, 2015
Loss contingency, Name of plaintiff	Stephen Kramer