Stockholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Stockholders Equity Note [Line Items]
Shares repurchased, value		$ 99,999,000
September 2010 Senior Unsecured Notes
Stockholders Equity Note [Line Items]
Accumulated other comprehensive loss related to hedges, after-tax loss relating to interest rate hedges	$ 1,500,000	1,800,000
Accumulated other comprehensive loss related to hedges, pre-tax loss relating to interest rate hedges	2,400,000	2,600,000
May 2014 Authorized Amount
Stockholders Equity Note [Line Items]
Amount authorized to repurchase shares	$ 200,000,000
Shares repurchased, value		$ 100,000,000
Number of Shares Authorized to be Repurchased	0