Debt (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Feb. 29, 2020
Debt Instrument [Line Items]
Total debt, gross	$ 172,000	$ 203,000
Unamortized debt issuance costs	(55)	(122)
Long-term Debt	171,945	202,878
Debt due within one year	(125,000)	(125,000)
Debt due after one year, net	46,945	77,878
Senior Notes [Member] \| Unsecured Senior Notes Due January 2021 [Member]
Debt Instrument [Line Items]
Total debt, gross	125,000	125,000
Line of Credit [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Total debt, gross	$ 47,000	$ 78,000

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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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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