Summary of Significant Accounting Policies - Litigation and non-routine costs, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Litigation and non-routine costs, net:
Audit Committee Investigation and related matters	$ (6,093)	$ 14,691
Legal fees and expenses	0	2
Litigation settlements	0	12,235
Total costs	(6,093)	26,928
Insurance recoveries	(2,471)	(48,420)
Total	$ (8,564)	$ (21,492)