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Income Taxes Unrecognized Benefits (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Unrecognized tax benefit - Permanent tax positions $ 3,500,000 $ 3,000,000.0
Unrecognized tax benefit - Temporary tax positions 1,500,000 1,500,000
Total unrecognized tax benefit 5,000,000.0 4,500,000
NOL and tax credit carryforwards 4,400,000 3,800,000
Related NOLs and tax credit carryforwards (1,400,000) (800,000)
Reasonably possible decrease in unrecognized tax benefits 3,700,000  
Penalties related to unrecognized tax benefits $ 0 $ 0