Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		1 Months Ended	6 Months Ended
	Aug. 31, 2013	Aug. 31, 2013 Interest Rate Cap	Feb. 28, 2013 Fixed to Floating Interest Rate Swap	Aug. 31, 2013 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
Period which requirement to fix or cap rates can be reduced to	1 year
Senior leverage ratio by May 31, 2014 to reduce the requirement to fix or cap interest rate to one year period		2.50
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