Pension Plan - Pension Plan's Fair Value Hierarchy for Assets Measured at Fair Value (Detail) - USD ($) $ in Thousands	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	$ 59,719	$ 60,600	$ 57,721
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	1,545	5,615
Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	8,592	9,836
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	15,593	16,879
Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	20,935	15,791
Foreign Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	13,054	12,479
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	35,534	33,885
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	1,545	5,615
Level 1 [Member] | Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	20,935	15,791
Level 1 [Member] | Foreign Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	13,054	12,479
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	24,185	26,715
Level 2 [Member] | Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	8,592	9,836
Level 2 [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	$ 15,593	$ 16,879