Loans and Allowance for Loan Losses - Internal Risk Rating (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Classes of the loan portfolio summarized by credit quality indicators:
Minimum threshold for performing annual review of commercial relationship	$ 1,000
Total Loans	911,085	$ 798,297	$ 734,254
Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	876,212	764,709
Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	20,240	17,929
Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	12,717	13,527
Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	1,916	2,132
Commercial
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	657,084	560,752	533,502
Commercial | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	626,171	531,153
Commercial | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	17,399	14,935
Commercial | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	11,682	12,532
Commercial | Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	1,832	2,132
Commercial Business
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	313,726	238,878
Commercial Business | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	307,156	234,547
Commercial Business | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	3,385	618
Commercial Business | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	3,185	3,713
Commercial Real Estate
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	267,832	280,780
Commercial Real Estate | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	249,488	262,215
Commercial Real Estate | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	11,072	11,242
Commercial Real Estate | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	7,272	7,323
Acquisition & Development
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	75,526	41,094
Acquisition & Development | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	69,527	34,391
Acquisition & Development | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	2,942	3,075
Acquisition & Development | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	1,225	1,496
Acquisition & Development | Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	1,832	2,132
Residential
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	184,543	174,507	143,627
Residential | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	181,412	171,395
Residential | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	2,051	2,147
Residential | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	996	965
Residential | Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	84
Home Equity
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	53,106	45,935	39,089
Home Equity | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	52,724	45,684
Home Equity | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	354	223
Home Equity | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	28	28
Consumer
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	16,352	17,103	$ 18,036
Consumer | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	15,905	16,477
Consumer | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	436	624
Consumer | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	$ 11	$ 2