Income Taxes - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2015	Jan. 01, 2015
Income Taxes [Line Items]
Unrecognized tax benefits		$ 2,000,000
Impact of unrecognized tax benefits if recognized		$ 2,000,000
Jurisdictions statutes of limitations expiration period	12 months
Period of expiration of the statute of limitations for certain jurisdictions	Within the next twelve months
Minimum
Income Taxes [Line Items]
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years	3 years
Maximum
Income Taxes [Line Items]
Accrued interest and penalties	$ 1,000,000
Foreign and U.S. state and local jurisdictions have statutes of limitations, in years	4 years