Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair value of assets and liabilities
Securities available-for-sale	$ 175,110	$ 162,368
U.S. Government Agency securities
Fair value of assets and liabilities
Securities available-for-sale	47,554	28,816
U.S. Sponsored Mortgage-backed securities
Fair value of assets and liabilities
Securities available-for-sale	58,247	54,732
Equity and other securities
Fair value of assets and liabilities
Securities available-for-sale	15,387	8,024
Recurring
Fair value of assets and liabilities
Loans held for sale	107,825	90,174
Recurring \| Level II
Fair value of assets and liabilities
Loans held for sale	107,825	90,174
Recurring \| Interest rate lock commitment
Fair value of assets and liabilities
Derivative asset	2,094	1,546
Recurring \| Interest rate lock commitment \| Level III
Fair value of assets and liabilities
Derivative asset	2,094	1,546
Recurring \| Mortgage-backed security hedges
Fair value of assets and liabilities
Derivative asset	449	372
Recurring \| Mortgage-backed security hedges \| Level II
Fair value of assets and liabilities
Derivative asset	449	372
Recurring \| Interest rate swap
Fair value of assets and liabilities
Derivative asset	58	250
Derivative liability	58	250
Recurring \| Interest rate swap \| Level II
Fair value of assets and liabilities
Derivative asset	58	250
Derivative liability	58	250
Recurring \| Interest rate cap
Fair value of assets and liabilities
Derivative asset	58	268
Recurring \| Interest rate cap \| Level II
Fair value of assets and liabilities
Derivative asset	58	268
Recurring \| U.S. Government Agency securities
Fair value of assets and liabilities
Securities available-for-sale	47,554	28,816
Recurring \| U.S. Government Agency securities \| Level II
Fair value of assets and liabilities
Securities available-for-sale	47,554	28,816
Recurring \| U.S. Sponsored Mortgage-backed securities
Fair value of assets and liabilities
Securities available-for-sale	58,247	54,732
Recurring \| U.S. Sponsored Mortgage-backed securities \| Level II
Fair value of assets and liabilities
Securities available-for-sale	58,247	54,732
Recurring \| Municipal securities
Fair value of assets and liabilities
Securities available-for-sale	53,922	70,796
Recurring \| Municipal securities \| Level II
Fair value of assets and liabilities
Securities available-for-sale	53,922	70,796
Recurring \| Equity and other securities
Fair value of assets and liabilities
Securities available-for-sale	15,387	8,024
Recurring \| Equity and other securities \| Level I
Fair value of assets and liabilities
Securities available-for-sale	2,206	897
Recurring \| Equity and other securities \| Level II
Fair value of assets and liabilities
Securities available-for-sale	$ 13,181	$ 7,127

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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