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Leases (Narratives) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Dec. 31, 2018
Leases [Abstract]        
Lease Expiration Date Dec. 31, 2023      
Operating Lease, Right-of-Use Asset $ 9,106   $ 9,400 $ 0
Operating lease liabilities $ 11,359   $ 11,700  
Operating Leases, Rent Expense, Net   $ 500