Commitments and Contingencies (Contractual Obligation, Fiscal Year Maturity Schedule) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Purchase Obligation	$ 1,752,139	[1]
Purchase Obligation, Due in Next Twelve Months	648,203	[1]
Purchase Obligation, Due in Second and Third Year	531,366	[1]
Purchase Obligation, Due in Fourth and Fifth Year	122,747	[1]
Purchase Obligation, Due after Fifth Year	449,823	[1]
Contractual Obligation, Total	1,752,139
Contractual Obligation, Due in Fiscal Year	648,203
Contractual Obligation, Due in Second and Third Year	531,366
Contractual Obligation, Due in Fourth and Fifth Year	122,747
Contractual Obligation, Due After Fifth Year	$ 449,823

[1] (1)Purchase obligations consist primarily of program rights obligations, participations, residuals, and transmission and marketing commitments.