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Loans - Summary of Impaired Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | $ 2,579 | $ 1,324
Impaired Loans with Allowance: Unpaid Principal Balance | 2,579 | 1,324
Impaired Loans with Allowance: Related Allowance | 1,170 | 932
Impaired Loans with No Allowance: Recorded Investment | 8,850 | 10,621
Impaired Loans with No Allowance: Unpaid Principal Balance | 8,850 | 10,822
Commercial and industrial |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | 1,368 | 948
Impaired Loans with Allowance: Unpaid Principal Balance | 1,368 | 948
Impaired Loans with Allowance: Related Allowance | 711 | 599
Impaired Loans with No Allowance: Recorded Investment | 1,078 | 1,178
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,078 | 1,178
Commercial real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | 832 | 0
Impaired Loans with Allowance: Unpaid Principal Balance | 832 | 0
Impaired Loans with Allowance: Related Allowance | 117 | 0
Impaired Loans with No Allowance: Recorded Investment | 7,671 | 8,764
Impaired Loans with No Allowance: Unpaid Principal Balance | 7,671 | 8,965
Commercial real estate construction |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment |  | 0
Impaired Loans with Allowance: Unpaid Principal Balance |  | 0
Impaired Loans with Allowance: Related Allowance |  | 0
Impaired Loans with No Allowance: Recorded Investment |  | 300
Impaired Loans with No Allowance: Unpaid Principal Balance |  | 300
Residential mortgage |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | 379 | 376
Impaired Loans with Allowance: Unpaid Principal Balance | 379 | 376
Impaired Loans with Allowance: Related Allowance | 342 | 333
Impaired Loans with No Allowance: Recorded Investment | 101 | 379
Impaired Loans with No Allowance: Unpaid Principal Balance | $ 101 | $ 379

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