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Basis of Presentation and Summary of Significant Accounting Policies Leases, Impact of New Accounting Standard Adoption (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Leases, Initial Application Period Cumulative Effect Transition [Line Items]      
Prepaid expenses and other current assets $ 127,630 $ 128,926  
Intangible assets, net 7,225,974 7,487,536 $ 7,488,194
Other assets 249,039 245,449  
Accrued expenses and other current liabilities 445,913 427,539 398,079
Other liabilities $ 297,874 234,771  
Calculated under Lease Guidance in Effect before ASC 842 [Member]      
Leases, Initial Application Period Cumulative Effect Transition [Line Items]      
Prepaid expenses and other current assets     129,811
Intangible assets, net     7,488,194
Other assets     120,279
Accrued expenses and other current liabilities     398,079
Other liabilities     $ 140,604
Accounting Standards Update 2016-02 [Member] | Difference between Lease Guidance in Effect before and after ASC 842 [Member]      
Leases, Initial Application Period Cumulative Effect Transition [Line Items]      
Prepaid expenses and other current assets   (885)  
Intangible assets, net   (658)  
Other assets   125,170  
Accrued expenses and other current liabilities   29,460  
Other liabilities   $ 94,167