Restructuring Charges - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Restructuring Cost And Reserve [Line Items]
Restructuring plan approval date by board of directors		2016-11
Restructuring charges		$ 8,118
Non-cash charges		5,800
Termination related costs, cash severance costs		2,300
Payments for restructuring charges		$ 1,200
Scenario, Forecast [Member]
Restructuring Cost And Reserve [Line Items]
Payments for restructuring charges	$ 1,100