Impairment and Credit Losses - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	$ 156,629	$ 156,629
Accumulated Amortization	23,893	20,329
Accumulated Impairment losses	0
Finite-life intangible assets, net carrying value	132,736	136,300
Indefinite-life intangible assets, gross carrying value	352,275
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	454,211	488,575
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	97,400	97,400
Accumulated Amortization	9,199	7,576
Accumulated Impairment losses	0
Finite-life intangible assets, net carrying value	88,201	89,824
Galapagos operating license
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	47,669	47,669
Accumulated Amortization	6,506	6,010
Accumulated Impairment losses	0
Finite-life intangible assets, net carrying value	41,163	41,659
Other finite-life intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-life intangible assets, gross carrying value	11,560	11,560
Accumulated Amortization	8,188	6,743
Accumulated Impairment losses	0
Finite-life intangible assets, net carrying value	$ 3,372	$ 4,817

Accumulated Impairment Of Intangible Assets

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Accumulated Impairment Of Intangible Assets, Finite-Lived

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No definition available.

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- Definition

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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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