Derivative Instruments and Hedging Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair value of derivatives - current
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	$ 34,362	$ 43,567
Effects of Netting	(24,541)	(17,511)
As Presented with Effects of Netting	9,821	26,056
Fair value of derivatives - current | Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	0	16,718
Effects of Netting	0	0
As Presented with Effects of Netting	0	16,718
Fair value of derivatives - current | Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	34,362	26,849
Effects of Netting	(24,541)	(17,511)
As Presented with Effects of Netting	9,821	9,338
Other assets, net
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	6,778	9,216
Effects of Netting	(5,457)	0
As Presented with Effects of Netting	1,321	9,216
Other assets, net | Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	1,089	9,216
Effects of Netting	0	0
As Presented with Effects of Netting	1,089	9,216
Other assets, net | Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	5,689	0
Effects of Netting	(5,457)	0
As Presented with Effects of Netting	232	0
Fair value of derivatives - current
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(59,491)	(88,708)
Effects of Netting	24,541	17,511
As Presented with Effects of Netting	(34,950)	(71,197)
Fair value of derivatives - current | Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(3)	(50,000)
Effects of Netting	0	0
As Presented with Effects of Netting	(3)	(50,000)
Fair value of derivatives - current | Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(59,488)	(38,708)
Effects of Netting	24,541	17,511
As Presented with Effects of Netting	(34,947)	(21,197)
Fair value of derivatives - non current
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(41,162)	(32,695)
Effects of Netting	5,457	0
As Presented with Effects of Netting	(35,705)	(32,695)
Fair value of derivatives - non current | Warrant liability
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(23,909)
Effects of Netting	0
As Presented with Effects of Netting	(23,909)
Fair value of derivatives - non current | Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(4,058)	(19,760)
Effects of Netting	0	0
As Presented with Effects of Netting	(4,058)	(19,760)
Fair value of derivatives - non current | Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(13,195)	(12,935)
Effects of Netting	5,457	0
As Presented with Effects of Netting	$ (7,738)	$ (12,935)