Acquisitions, Litigation, and Other Charges - Components of Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Acquisition, Litigation and Other Special Charges [Abstract]
Acquisition related costs	$ 4,861	$ 2,671	$ 8,278	$ 19,126
Litigation	258	197	258	1,574
Severance, equity award modifications and acceleration	(50)	1,031	1,022	7,965
Non-offering related equity issuance expenses	0	(29)	0	1,318
Terminated site operations costs	(520)	(90)	(520)	254
Other	733	0	733	0
Acquisition, litigation and other	$ 5,282	$ 3,780	$ 9,771	$ 30,237