Nature of Business, Interim Financial Data and Basis of Presentation (Condensed Supplemental Cash Flow) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Supplemental disclosures of cash flow information:
Interest paid	$ 7,192	$ 21,252
Income taxes refunded	(122)	(675)
Net revenue	227,914	267,496
Supplemental disclosures of non-cash flow information:
Trade revenue		13,308
Trade expense		10,365
Reconciliation of cash and cash equivalents and restricted cash to the Condensed Consolidated Balance Sheet:
Cash and cash equivalents	105,728	15,333	$ 15,142
Restricted cash	1,395	2,460	1,865
Total cash and cash equivalents and restricted cash	$ 107,123	$ 17,793	$ 17,007	$ 30,038