Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Feb. 29, 2020	Jan. 21, 2011
Debt Instrument [Line Items]
Total debt, gross	$ 179,000	$ 203,000
Unamortized debt issuance costs	(581)	(122)
Total debt, net	178,419	202,878
Less amount due within one year	0	(125,000)
Debt due after one year, net	178,419	77,878
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Total debt, gross	29,000	78,000
Senior Notes \| Unsecured Senior Notes Due January 2021
Debt Instrument [Line Items]
Total debt, gross	0	125,000	$ 125,000
Senior Notes \| 2020 Senior Notes
Debt Instrument [Line Items]
Total debt, gross	$ 150,000	$ 0

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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