Income Taxes - Net operating loss carryforwards (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Federal
Operating loss carry-forwards
Net operating loss carry forwards	$ 403,579
Net operating loss carryforwards subject to expiration	34,149
Net operating loss carryforwards not subject to expiration	369,430
State
Operating loss carry-forwards
Net operating loss carry forwards	$ 337,057