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Schedule of Components of Deferred Income Taxes (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Mar. 31, 2016
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Income Tax Disclosure [Abstract] |  |
Items Giving Rise to Deferred Tax Liabilities - Excess Tax Depreciation and Amortization | $ (161,204) | $ (157,260)
Items Giving Rise to Deferred Tax Liabilities - Depletion | (18,638) | (21,911)
Items Giving Rise to Deferred Tax Liabilities - Repair Parts | (1,747) | (2,446)
Items Giving Rise to Deferred Tax Liabilities - State Income Taxes, net | (8,883) | (12,552)
Items Giving Rise to Deferred Tax Liabilities - Other | (8,515) | (4,147)
Items Giving Rise to Deferred Tax Liabilities - Total Deferred Tax Liabilities | (198,987) | (198,316)
Items Giving Rise to Deferred Tax Assets - Accrual Changes | 12,992 | 11,855
Items Giving Rise to Deferred Tax Assets - Bad Debts | 3,895 | 3,604
Items Giving Rise to Deferred Tax Assets - Uniform Capitalization | 2,989 | 2,174
Items Giving Rise to Deferred Tax Assets - Deferred Revenue |  | 700
Items Giving Rise to Deferred Tax Assets - Long-term Incentive Compensation Plan | 8,691 | 11,458
Items Giving Rise to Deferred Tax Assets - Pension and Other | 4,396 | 6,846
Items Giving Rise to Deferred Tax Assets - Total Deferred Tax Assets | $ 32,963 | $ 36,637

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- Definition Amount of deferred tax liability attributable to taxable temporary differences. + 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(15)(b)(2)) -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(15)(2)) -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 -Glossary Deferred Tax Liability -URI http://asc.fasb.org/extlink&oid=6510232 Reference 4: 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(26)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: 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(26)(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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