Acquisitions, Litigation, and Other Charges Acquisitions, Litigation, and Other Charges - Components of Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Acquisition, Litigation and Other Special Charges [Abstract]
Acquisition related costs	$ 24,284	$ 671	$ 0
Litigation	4,553	0	0
Strategic alternative costs	0	0	8,136
Other:
Severance, equity award modifications and acceleration	9,789	2,053	516
Non-offering related equity issuance expenses	1,356	1,813	0
Terminated site operations costs	632	(1,804)	2,677
Non-recurring public company implementation costs	0	1,202	0
Total other	11,777	3,264	3,193
Total acquisition, litigation and other	$ 40,614	$ 3,935	$ 11,329