Annual report pursuant to Section 13 and 15(d)

Investments in Affiliates Accounted for Using the Equity Method - Accounting Changes (Details)

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Investments in Affiliates Accounted for Using the Equity Method - Accounting Changes (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Right-of-use asset $ 98,992  
Operating lease liabilities $ 61,305  
Charter | ASU 2016-02 | Cumulative Effect, Period of Adoption, Adjustment    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Right-of-use asset   $ 1,100,000
Operating lease liabilities   $ 1,200,000