The Company and Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2016
Company And Subsequent Events [Abstract]
Amount paid withholding tax in Canadian Revenue Agency	$ 1,300	$ 6,300
Expects to pay withholding tax amount in Canadian Revenue Agency	2,000
Combined withholding taxes relates to reorganization			$ 9,600
Accrued one-time income tax payment	$ 32,000		$ 32,000