Basis of Presentation - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments			2
Net foreign exchange losses resulting from foreign currency transactions included in other income | $	$ 21	$ 8	$ 27	$ 47