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Income Taxes - Operating Loss Carryforwards (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 476,000
U.S. NOLs
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	377,865
U.S. NOLs | 2021 - 2025
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
U.S. NOLs | 2026 - 2030
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	0
U.S. NOLs | 2031 - 2039
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	168,163
U.S. NOLs | Does not expire
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	209,702
Foreign NOLs
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	97,881
Foreign NOLs | 2021 - 2025
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	21,230
Foreign NOLs | 2026 - 2030
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	5,648
Foreign NOLs | 2031 - 2039
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	335
Foreign NOLs | Does not expire
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	70,668
R&D Credits
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	1,156
R&D Credits | 2021 - 2025
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	0
R&D Credits | 2026 - 2030
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	0
R&D Credits | 2031 - 2039
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	1,156
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
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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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