Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	$ 156,629	$ 156,629
Finite-life intangible assets, accumulated amortization	33,250	20,329
Finite-life intangible assets, accumulated impairment losses	0
Finite-life intangible assets, net carrying value	123,379	136,300
Indefinite-life intangible assets, gross carrying value	352,275	352,275
Indefinite-life intangible assets, accumulated impairment losses	30,800
Indefinite-life intangible assets, net carrying value	321,475	352,275
Gross Carrying Value	508,904	508,904
Accumulated Impairment Losses	30,800
Net Carrying Value	444,854	488,575
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	97,400	97,400
Finite-life intangible assets, accumulated amortization	14,069	7,576
Finite-life intangible assets, accumulated impairment losses	0
Finite-life intangible assets, net carrying value	$ 83,331	$ 89,824
Customer relationships \| Weighted Average
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period (Years)	12 years 9 months 18 days	13 years 9 months 18 days
Galapagos operating license
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	$ 47,669	$ 47,669
Finite-life intangible assets, accumulated amortization	7,621	6,010
Finite-life intangible assets, accumulated impairment losses	0
Finite-life intangible assets, net carrying value	$ 40,048	$ 41,659
Galapagos operating license \| Weighted Average
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period (Years)	23 years 9 months 18 days	24 years 8 months 12 days
Other finite-life intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	$ 11,560	$ 11,560
Finite-life intangible assets, accumulated amortization	11,560	6,743
Finite-life intangible assets, accumulated impairment losses	0
Finite-life intangible assets, net carrying value	$ 0	$ 4,817
Other finite-life intangible assets \| Weighted Average
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period (Years)	0 years	9 months 18 days

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Accumulated Impairment Of Intangible Assets, Finite-Lived

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Accumulated Impairment Of Intangible Assets, Indefinite-Lived (Excluding Goodwill)

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Indefinite-Lived Intangible Assets, Gross (Excluding Goodwill)

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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