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Income Taxes - Operating Loss Carryforwards (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 443,600
U.S. NOLs
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	371,173
U.S. NOLs | 2020 - 2024
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
U.S. NOLs | 2025 - 2029
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
U.S. NOLs | 2030 - 2038
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	196,550
U.S. NOLs | Does not expire
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	174,623
Foreign NOLs
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	72,428
Foreign NOLs | 2020 - 2024
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	11,598
Foreign NOLs | 2025 - 2029
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	8,084
Foreign NOLs | 2030 - 2038
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
Foreign NOLs | Does not expire
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	52,746
R&D Credits
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	1,016
R&D Credits | 2020 - 2024
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	0
R&D Credits | 2025 - 2029
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	0
R&D Credits | 2030 - 2038
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	1,016
R&D Credits | Does not expire
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 0

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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