Goodwill and Intangibles - Schedule of Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Goodwill [Roll Forward]
Goodwill, net beginning balance	$ 135,216
Goodwill, net ending balance	135,216
NET Services
Goodwill [Roll Forward]
Goodwill beginning balance	191,215
Accumulated impairment losses beginning balance	(96,000)
Goodwill, net beginning balance	95,215
Acquisition of Circulation	40,001
Goodwill ending balance	231,216
Accumulated impairment losses ending balance	(96,000)
Goodwill, net ending balance	$ 135,216