Legal Proceedings - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended
	Dec. 23, 2013	Jul. 31, 2011	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013 Kayne Litigation	Dec. 31, 2012 Kayne Litigation	Dec. 31, 2013 Kayne Litigation	Dec. 31, 2012 Kayne Litigation
Commitments and Contingencies Disclosure [Line Items]
Reference to approximate value of previous judgment that plaintiff had against Grande		$ 60,000,000
Cash payment for legal settlements	4,000,000
Percentage of potential liability settled	7.00%
Loss on settlement of litigation			(4,000,000)	(4,000,000)
Legal fees					$ 1,000,000	$ 300,000	$ 1,600,000	$ 800,000