Revenues - Deferred Revenue (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Movement in Deferred Revenue
Beginning balance	$ 218,823
Cash receipts	1,093,906
Revenue recognized	(1,105,132)
Ending balance	207,597
Advertising, Marketing Services, and Other
Movement in Deferred Revenue
Beginning balance	67,543
Cash receipts	215,050
Revenue recognized	(221,052)
Ending balance	61,541
Circulation
Movement in Deferred Revenue
Beginning balance	151,280
Cash receipts	878,856
Revenue recognized	(884,080)
Ending balance	$ 146,056