Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details)

v3.20.2
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)