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Income Tax (Effective Income Tax Rate) (detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Income Tax Disclosure [Abstract] |  |  |
Current Federal Tax Expense (Benefit) | $ 24,579 | $ 4,380 | $ 7,238
Current State and Local Tax Expense (Benefit) | 1,953 | 453 | 123
Total | 26,532 | 4,833 | 7,361
Deferred Federal Income Tax Expense (Benefit) | (689) | (925) | (3,231)
Deferred State and Local Income Tax Expense (Benefit) | 156 | 313 | (567)
Total | (533) | (612) | (3,798)
Income Tax Expense (Benefit), Total | $ 25,999 | $ 4,221 | $ 3,563
Computed | 35.00% | 35.00% | 35.00%
State income taxes (net of federal tax benefit) | 2.70% | 2.90% | 3.40%
Federal tax credits | (0.40%) | (2.40%) | (3.60%)
State tax credits | 0.90% | 8.70% | 1.60%
Manufacturer's deduction | 3.90% | 5.00% | 4.60%
Addition to (reversal of) uncertain tax positions | 0.20% | (1.00%) | (0.80%)
State VDA/Nexus Changes | 0.00% | 0.00% | (1.70%)
Other permanent differences not (taxable) deductible | (0.20%) | 0.70% | 0.50%
Change in valuation allowance | 0.10% | 9.90% | (2.10%)
Effective Income Tax Rate Reconciliation Pension Contribution | 0.00% | 0.00% | 0.40%
Other | (0.30%) | (1.50%) | (4.40%)
Effective income tax rate | 32.30% | 29.90% | 20.50%

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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6509736 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Paragraph Question 1-7 + Details
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