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Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 05, 2019
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Debt issuance costs | $ (9,100) | $ (11,800) |
Long-term debt, net of debt issuance costs | 1,284,400 | 1,505,000 |
Current portion of long-term debt | (13,000) | (13,000) |
Long-term debt | $ 1,271,438 | $ 1,491,996 |
Series 2019-1 4.194% Fixed Rate Senior Secured Notes, Class A-2-I |  |  |
Debt Instrument [Line Items] |  |  |
Debt interest rate (percent) | 4.194% | 4.194% | 4.194%
Senior notes | $ 696,500 | $ 698,300 |
Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II |  |  |
Debt Instrument [Line Items] |  |  |
Debt interest rate (percent) | 4.723% | 4.723% |
Senior notes | $ 597,000 | $ 598,500 |
Series 2019-1 Variable Funding Senior Notes Class A-1, variable interest rate of 2.42% at December 31, 2020 |  |  |
Debt Instrument [Line Items] |  |  |
Debt interest rate (percent) |  | 2.42% |
Senior notes | $ 0 | $ 220,000 |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&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(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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=120398452&loc=d3e534808-122878 Reference 4: 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=120391452&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: 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(a)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: 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=120398452&loc=d3e534808-122878 + Details
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