Derivative Instruments and Hedging Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details) - Not Designated as Hedging Instrument - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Fair value of derivatives - current
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	$ 63,453,000	$ 43,567,000
Effects of Netting	(31,890,000)	(17,511,000)
As Presented with Effects of Netting	31,563,000	26,056,000
Fair value of derivatives - current \| Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	73,000	16,718,000
Effects of Netting	0	0
As Presented with Effects of Netting	73,000	16,718,000
Fair value of derivatives - current \| Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	63,380,000	26,849,000
Effects of Netting	(31,890,000)	(17,511,000)
As Presented with Effects of Netting	31,490,000	9,338,000
Other assets, net
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	2,638,000	9,216,000
Effects of Netting	(952,000)	0
As Presented with Effects of Netting	1,686,000	9,216,000
Other assets, net \| Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	1,234,000	9,216,000
Effects of Netting	0	0
As Presented with Effects of Netting	1,234,000	9,216,000
Other assets, net \| Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	1,404,000	0
Effects of Netting	(952,000)	0
As Presented with Effects of Netting	452,000	0
Fair value of derivatives - current
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(64,573,000)	(88,708,000)
Effects of Netting	31,890,000	17,511,000
As Presented with Effects of Netting	(32,683,000)	(71,197,000)
Fair value of derivatives - current \| Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(451,000)	(50,000,000)
Effects of Netting	0	0
As Presented with Effects of Netting	(451,000)	(50,000,000)
Fair value of derivatives - current \| Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(64,122,000)	(38,708,000)
Effects of Netting	31,890,000	17,511,000
As Presented with Effects of Netting	(32,232,000)	(21,197,000)
Fair value of derivatives - non current
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(9,630,000)	(32,695,000)
Effects of Netting	952,000	0
As Presented with Effects of Netting	(8,678,000)	(32,695,000)
Fair value of derivatives - non current \| Contingent Consideration Arrangements
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(3,112,000)	(19,760,000)
Effects of Netting	0	0
As Presented with Effects of Netting	(3,112,000)	(19,760,000)
Fair value of derivatives - non current \| Contingent consideration arrangement
Offsetting Assets and Liabilities [Line Items]
Presented without Effects of Netting	(6,518,000)	(12,935,000)
Effects of Netting	952,000	0
As Presented with Effects of Netting	$ (5,566,000)	$ (12,935,000)

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