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Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2008 | Feb. 29, 2016 | Feb. 28, 2018 | Feb. 28, 2017
Debt Instrument [Line Items] |  |  |  |
Total |  |  | $ 300,895,000 | $ 271,429,000
Debt, Current |  | $ 16,629,000 | 14,286,000 | 16,629,000
Total |  |  | 301,286,000 | 272,290,000
Unamortized Debt Issuance Expense |  |  | (391,000) | (861,000)
Long-term debt, exculding current maturities |  | 254,800,000 | 286,609,000 | 254,800,000
Senior Notes [Member] | Unsecured Senior Notes Due January 2021 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total |  |  | 125,000,000 | 125,000,000
Senior Notes [Member] | Unsecured Senior Notes Due March 2012 through March 2018 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total |  |  | 14,286,000 | 28,571,000
Annual installments | $ 14,300,000 | $ 14,285,714 |  |
Medium-term Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total |  |  | 0 | 49,219,000
Line of Credit [Member] | Line of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total |  |  | $ 162,000,000 | $ 69,500,000

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of the required periodic payments including both interest and principal payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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