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Operating Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Payments [Abstract]      
2019 $ 1,999    
2020 1,710    
2021 1,737    
2022 1,760    
2023 1,696    
Thereafter 13,031    
Total 21,933    
Receipts [Abstract]      
2019 716    
2020 539    
2021 440    
2022 348    
2023 233    
Thereafter 91    
Total 2,367    
Rental expense net of rental income under operating leases $ 1,300 $ 1,400 $ 1,300