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Leases Supplemental Lease Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Debt Instrument [Line Items]        
Operating Lease, Expense $ 683 $ 569 $ 2,000 $ 1,700
Operating lease costs 827   2,386  
Short-term lease costs $ 71   $ 251  
Weighted average remaining lease term (in years) 7 years 3 months 14 days   7 years 3 months 14 days  
Weighted-average discount rate 3.60%   3.60%  
Lease liabilities arising from obtaining right-of-use assets $ 2,530   $ 17,228  
Notes Payable 9.56 Percent Due 2031 [Member]        
Debt Instrument [Line Items]        
Notes Payable to Bank $ 28,000   $ 28,000