Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended		3 Months Ended
	May 31, 2014	May 31, 2014 Interest Rate Cap	Feb. 28, 2013 Fixed to Floating Interest Rate Swap	Feb. 28, 2014 Fixed to Floating Interest Rate Swap	May 31, 2014 Maximum
Interest Rate Risk [Abstract]
Percentage of term loan portion required to fix interest rate swap		50.00%
Period which required to fix or cap interest rates	2 years
Increase in interest expense					$ 0.1
Interest rate swap term			2 years
Fixed rate payable on interest rate swap				0.42%
Interest Rate Swap Notional Principal Amount				40
Accumulated other comprehensive loss balance related to derivative instruments					$ 0.1