Income Taxes - Net Operating Loss Carryforwards and Tax Credits (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 1,159,329
Tax credit carryforward, amount	58,404
Operating loss carryforwards with indefinite lives	902,507
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	630,151
Tax credit carryforward, amount	38,817
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 13,772