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Long-Term Debt (Schedule of debt) (detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016
Debt Instrument [Line Items] |  |
Long-term Debt | $ 332,633 | $ 315,539
Total | 332,633 | 315,539
Current Portion of Long-Term Debt | 3,495 | 279,572
Long-Term Debt, Less Current Portion | 329,138 | 35,967
Revolving credit facility [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 214,781 | $ 271,592
Long-term Debt, Weighted Average Interest Rate | 2.22% | 1.95%
Debt Instrument, Maturity Date | 2022 |
Total | $ 214,781 | $ 271,592
Secured Industrial Revenue Development Bonds [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt |  | $ 22,630
Long-term Debt, Weighted Average Interest Rate |  | 3.02%
Total |  | $ 22,630
Secured Industrial Revenue Development Bond [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 999 | $ 1,200
Long-term Debt, Weighted Average Interest Rate | 2.00% | 2.00%
Debt Instrument, Maturity Date | 2021 |
Total | $ 999 | $ 1,200
Secured promissory note 1 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 10,340 | $ 12,114
Long-term Debt, Weighted Average Interest Rate | 6.98% | 6.98%
Debt Instrument, Maturity Date | 2022 |
Total | $ 10,340 | $ 12,114
Secured promissory note 2 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 1,782 | $ 2,474
Long-term Debt, Weighted Average Interest Rate | 6.35% | 6.35%
Debt Instrument, Maturity Date | 2020 |
Total | $ 1,782 | $ 2,474
Other [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | 216 | 216
Total | 216 | 216
Lease financing obligations [Member} |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 4,679 | $ 5,313
Long-term Debt, Weighted Average Interest Rate | 2.62% | 2.62%
Debt Instrument, Maturity Date | 2020 |
Total | $ 4,679 | $ 5,313
Term Loan [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt | $ 99,836 |
Long-term Debt, Weighted Average Interest Rate | 3.38% |
Debt Instrument, Maturity Date | 2022 |
Total | $ 99,836 |

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- Definition 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. + References Reference 1: 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: 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 Reference 3: 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 + Details
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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://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 Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
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