Restructuring Charge - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2015	[1]
Restructuring And Related Activities [Abstract]
Restructuring charge			$ 7,586,000	$ 7,586,000
Payments related to restructuring charges	$ 0	$ 5,800,000

[1] Refer to Note (14) for additional information regarding the restructuring charge.