Income Taxes - Operating loss carryforwards (Details) $ in Thousands	Sep. 30, 2020 USD ($)
U.S.
Operating loss carryforwards
Operating Loss Carryforwards	$ 159,676
Capital loss carryforwards	10,052
State
Operating loss carryforwards
Operating Loss Carryforwards	118,791
Capital loss carryforwards	27,639
Foreign
Operating loss carryforwards
Operating Loss Carryforwards	$ 18,959