Pension Plan - Pension Plan's Fair Value Hierarchy for Assets Measured at Fair Value (Detail) - USD ($) $ in Thousands	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	$ 60,600	$ 57,721	$ 56,884
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	5,615	3,945
Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	9,836	16,128
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	16,879	10,722
Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	20,567	20,903
Foreign Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	7,703	6,023
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	33,885	30,871
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	5,615	3,945
Level 1 [Member] | Domestic Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	20,567	20,903
Level 1 [Member] | Foreign Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	7,703	6,023
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	26,715	26,850
Level 2 [Member] | Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	9,836	16,128
Level 2 [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Measurements	$ 16,879	$ 10,722