Fair Value Measurements Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Feb. 28, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	$ 6,750	$ 6,750
Total assets measured at fair value on a recurring basis	6,750	6,750
Deferred Compensation Share-based Arrangements, Liability, Current		714
Interest rate swap agreement		94
Total liabilities measured at fair value on a recurring basis		808
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities
Total assets measured at fair value on a recurring basis
Deferred Compensation Share-based Arrangements, Liability, Current		714
Interest rate swap agreement
Total liabilities measured at fair value on a recurring basis		714
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities
Total assets measured at fair value on a recurring basis
Deferred Compensation Share-based Arrangements, Liability, Current		0
Interest rate swap agreement		94
Total liabilities measured at fair value on a recurring basis		94
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	6,750	6,750
Total assets measured at fair value on a recurring basis	6,750	6,750
Deferred Compensation Share-based Arrangements, Liability, Current		0
Interest rate swap agreement
Total liabilities measured at fair value on a recurring basis