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Note 5 - Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017
--- | --- | ---
Long-term debt | $ 417,834 | $ 332,633
Less current portion | 3,702 | 3,495
Total | 414,132 | 329,138
Line of Credit [Member] |  |
Long-term debt | 293,459 | 214,781
Term Loan [Member] |  |
Long-term debt | 99,871 | 99,836
Tax-exempt Bond [Member] |  |
Long-term debt | 9,983 |
Secured Promissory Note 1 [Member] |  |
Long-term debt | 8,438 | 10,340
Lease Financing Obligations [Member] |  |
Long-term debt | 4,028 | 4,679
Secured Promissory Note 2 [Member] |  |
Long-term debt | 1,046 | 1,782
Economic Development Note [Member] |  |
Long-term debt | 793 | 999
Other [Member] |  |
Long-term debt | $ 216 | $ 216

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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