Pension Plan - Plan's Fair Value Hierarchy for Assets Measured at Fair Value (Detail) - USD ($) $ in Thousands	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	$ 47,547	$ 50,993	$ 49,423
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	3,576	4,262
Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	10,887	10,642
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	7,134	8,154
Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	20,226	21,974
Foreign Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	5,724	5,961
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	29,526	32,197
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	3,576	4,262
Level 1 [Member] | Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	20,226	21,974
Level 1 [Member] | Foreign Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	5,724	5,961
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	18,021	18,796
Level 2 [Member] | Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	10,887	10,642
Level 2 [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	$ 7,134	$ 8,154