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Seasonal Financing and Debt - Long-Term Debt Maturity (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
2019 | $ 0 |
2020 | 250,000 |
2021 | 350,000 |
2022 | 0 |
2023 | 250,000 |
Thereafter | 2,050,000 |
Long-term debt | 2,900,000 | $ 3,150,000
2010 Senior Notes due October 2020 and October 2040 | Senior Notes |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
2019 | 0 |
2020 | 250,000 |
2021 | 0 |
2022 | 0 |
2023 | 0 |
Thereafter | 250,000 |
Long-term debt | 500,000 | 500,000
2011 Senior Notes due November 2041 | Senior Notes |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
2019 | 0 |
2020 | 0 |
2021 | 0 |
2022 | 0 |
2023 | 0 |
Thereafter | 300,000 |
Long-term debt | 300,000 | 300,000
2013 Senior Notes due March 2018 and March 2023 | Senior Notes |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
2019 | 0 |
2020 | 0 |
2021 | 0 |
2022 | 0 |
2023 | 250,000 |
Thereafter | 0 |
Long-term debt | 250,000 | 500,000
2016 Senior Notes due August 2021 | Senior Notes |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
2019 | 0 |
2020 | 0 |
2021 | 350,000 |
2022 | 0 |
2023 | 0 |
Thereafter | 0 |
Long-term debt | 350,000 | 350,000
2017/2018 Senior Notes due December 2025 | Senior Notes |  |
Long Term Debt Maturities Repayments Of Principal [Line Items] |  |
2019 | 0 |
2020 | 0 |
2021 | 0 |
2022 | 0 |
2023 | 0 |
Thereafter | 1,500,000 |
Long-term debt | $ 1,500,000 | $ 1,000,000

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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