Income Taxes - Net Operating Loss Carryforwards (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Domestic Tax Authority \| Earliest Tax Year
Operating Loss Carryforwards [Line Items]
NOL	$ 631,046
Domestic Tax Authority \| Latest Tax Year
Operating Loss Carryforwards [Line Items]
NOL	12,200
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
NOL	$ 153,585