Schedule of Common Stock Repurchased and Average Price Paid Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2015
Stockholders Equity [Abstract]
Aggregate dollar outlay for common stock repurchased	$ 99,999		$ 99,999	$ 99,999
Number of Shares Repurchased	2,841,976	0	2,841,976
Average price paid per common share	$ 35.19		$ 35.19