Restructuring Charge - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Restructuring And Related Activities [Abstract]
Restructuring charge	$ 7,600	$ 4,100	$ 7,586	$ 4,052