Debt (Debt Covenants and Dividend Restrictions) - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	[1]	Mar. 31, 2013 USD ($)	[1]
Debt Instrument [Line Items]
Maximum capital distributions	$ 7,869,000	$ 115,058,000		$ 6,155,000
Debt Covenants [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maximum capital distributions	$ 50,000,000
Leverage ratio	4
Debt Covenants [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio, minimum	3
Fixed charge coverage ratio	1.25

[1] See Note 2. Restatement of Previously Issued Financial Statements.