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Contingencies (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended 36 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2017
Dec. 31, 2015
Sep. 30, 2022
State and local incentives received     $ 1,410 $ 15,733  
Deferred liability balance $ 7,496 $ 7,496      
Contingency losses 7,500 $ 7,500      
Settlement payments $ 3,500        
Maximum [Member]          
Incentive term   6 years      
Scenario, Forecast [Member]          
Settlement payments         $ 4