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Long-Term Borrowings (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Less: unamortized debt issuance costs $ (2,509) $ (2,704)
Long-term borrowings 217,491 217,296
Subordinated Notes, 5.75% [Member]    
Subordinated notes 70,000 70,000
Subordinated Notes, 5.0% [Member]    
Subordinated notes $ 150,000 $ 150,000