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Loans and Allowance for Loan Losses - Summary of Average Recorded Investment and Interest Income Recognized on Impaired Loans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Financing Receivable Impaired [Line Items]        
Impaired loans with no related allowance recorded, Average recorded investment $ 1,245   $ 1,272  
Impaired loans with an allowance recorded, Average recorded investment 1,941 $ 5,096 2,141 $ 5,276
Impaired loans with an allowance recorded, Interest income recognized       30
Average recorded investment 3,186 5,096 3,413 5,276
Interest income recognized       30
Commercial real estate        
Financing Receivable Impaired [Line Items]        
Impaired loans with no related allowance recorded, Average recorded investment 1,245   1,272  
Impaired loans with an allowance recorded, Average recorded investment   1,685   1,742
Commercial and industrial        
Financing Receivable Impaired [Line Items]        
Impaired loans with an allowance recorded, Average recorded investment $ 1,941 $ 3,411 $ 2,141 3,534
Impaired loans with an allowance recorded, Interest income recognized       $ 30