Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 1,031,000
Non-current operating lease liabilities	$ 952,678
Content assets, amortization period cap	10 years
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU 2016-02, Leases (Topic 842)		$ 2,474
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		743,000
Non-current operating lease liabilities		813,000
ASU 2016-02 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU 2016-02, Leases (Topic 842)		$ 2,000