Acquisitions, Litigation, and Other Charges - Components of Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Acquisition, Litigation and Other Special Charges [Abstract]
Acquisition related costs	$ 766	$ 1,441
Litigation	0	910
Other:
Severance, equity award modifications and acceleration	922	4,293
Non-offering related equity issuance expenses	0	1,511
Terminated site operations costs	0	338
Total other	922	6,142
Total acquisition, litigation and other	$ 1,688	$ 8,493