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Fair Value of Financial Instruments Fair Value of Long-Term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Fair Value Disclosures [Abstract] |  |
Total long-term debt, excluding debt issuance costs | $ 3,588,157 | $ 3,069,417
Total long-term debt, fair value, excluding debt issuance costs | $ 3,783,225 | $ 3,173,341

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- Definition Debt Instrument, Carrying Amount, Excluding Debt Issuance Costs + References No definition available. + Details
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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- References No definition available. + Details
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