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Note 6 - Leases (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016
Capital Leased Assets, Gross, Total | $ 49,293 | $ 40,910 |
Operating Leases, Rent Expense, Total | 47,000 | 48,300 | $ 51,400
Building [Member] |  |  |
Capital Leased Assets, Gross, Total | $ 5,313 | 5,313 |
Capital Lease Obligations, Interest Rate | 5.15% |  |
Equipment [Member] |  |  |
Capital Leased Assets, Gross, Total | $ 43,980 | $ 35,597 |
Capital Leases, Term | 7 years |  |
Equipment [Member] | Minimum [Member] |  |  |
Capital Lease Obligations, Interest Rate | 3.37% |  |
Equipment [Member] | Maximum [Member] |  |  |
Capital Lease Obligations, Interest Rate | 4.21% |  |

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- Definition Represents the interest rate of capital lease obligations. + References No definition available. + Details
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- Definition Represents the capital leases term. + References No definition available. + Details
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- Definition Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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