The Company and Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Mar. 31, 2016
Company And Subsequent Events [Abstract]
Amount paid withholding taxes in Canadian Revenue Agency	$ 7,600
Income tax expense related to intercompany dividends	$ 2,500
Accrued one-time income tax payment		$ 32,600