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Fair Value of Financial Instruments - Schedule of Fair Value Hierarchy Level and Estimated Fair Value of Significant Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial Assets:
Investment securities - AFS	$ 55,697	$ 39,277
Investment securities - HTM	5,485	6,553
Fair Value, Inputs, Level 1 | Carrying Value
Financial Assets:
Cash and due from banks	69,552	74,213
Federal funds sold and other cash equivalents	96,500	44,500
Interest-earning deposits in other financial institutions	100	345
Mortgage loans held for sale	125,704	44,345
Fair Value, Inputs, Level 1 | Fair Value
Financial Assets:
Cash and due from banks	69,552	74,213
Federal funds sold and other cash equivalents	96,500	44,500
Interest-earning deposits in other financial institutions	100	345
Mortgage loans held for sale	128,491	45,433
Fair Value Measurements Using Level 2 | Carrying Value
Financial Assets:
Investment securities - AFS	55,697	39,277
Investment securities - HTM	5,191	6,214
Financial Liabilities:
Deposits	1,318,292	1,152,763
Long-term debt	49,492	49,383
Fair Value Measurements Using Level 2 | Fair Value
Financial Assets:
Investment securities - AFS	55,697	39,277
Investment securities - HTM	5,485	6,553
Financial Liabilities:
Deposits	1,315,698	1,140,707
Long-term debt	47,657	48,447
Fair Value Measurements Using Level 3 | Carrying Value
Financial Assets:
Loans, net	1,185,102	1,096,284
Financial Liabilities:
Subordinated debenture liability	3,402	3,334
Fair Value Measurements Using Level 3 | Fair Value
Financial Assets:
Loans, net	1,205,092	1,095,944
Financial Liabilities:
Subordinated debenture liability	$ 3,582	$ 3,334

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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