Income Taxes Tax attributes available to reduce future taxable income (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 197,122
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	94,082
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,814
Foreign Tax Authority with Indefinite Expiration
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 18,806