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Leases Lease Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Leases [Abstract]      
Rental expense   $ 8,700 $ 6,500
Straight-line lease cost $ 7,780    
Operating Lease, Impairment Loss 312    
Operating Lease, Expense 8,092    
Depreciation 238    
Interest on lease liabilities 27    
Total finance lease cost 265    
Total lease cost $ 8,357