Effect of Derivative Financial Instruments on Consolidated Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on derivative (effective portion)	$ (72)	$ (19)	$ (15)	$ 3
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(25)	(23)	(27)	(45)
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Interest Rate Swap Agreements
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on derivative (effective portion)	(72)	(19)	(15)	3
Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Interest expense		Interest expense
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (25)	$ (23)	$ (27)	$ (45)
Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	N/A		N/A