Intangible Assets and Goodwill - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Intangible assets that are subject to amortization
Cost	$ 1,082,600	$ 1,082,600
Accumulated Amortization	(149,111)	(124,259)
Net Carrying Amount	$ 933,489	$ 958,341
Customer relationships
Intangible assets that are subject to amortization
Amortization Period	12 years	12 years
Cost	$ 928,200	$ 928,200
Accumulated Amortization	(116,025)	(96,687)
Net Carrying Amount	$ 812,175	$ 831,513
Content and data
Intangible assets that are subject to amortization
Amortization Period	7 years	7 years
Cost	$ 154,400	$ 154,400
Accumulated Amortization	(33,086)	(27,572)
Net Carrying Amount	$ 121,314	$ 126,828