Loans and Allowance for Loan Losses - Internal Risk Rating (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 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	994,833	$ 994,833	$ 798,297	$ 762,926
Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		958,698	764,709
Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		21,968	17,929
Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		12,578	13,527
Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		1,589	2,132
Commercial
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	699,659	699,659	560,752	549,091
Commercial | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		667,453	531,153
Commercial | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		19,207	14,935
Commercial | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		11,467	12,532
Commercial | Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		1,532	2,132
Commercial Business
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	327,107	327,107	238,878
Commercial Business | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		318,871	234,547
Commercial Business | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		5,334	618
Commercial Business | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		2,902	3,713
Commercial Real Estate
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	288,688	288,688	280,780
Commercial Real Estate | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		270,414	262,215
Commercial Real Estate | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		10,933	11,242
Commercial Real Estate | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		7,341	7,323
Acquisition & Development
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	83,864	83,864	41,094
Acquisition & Development | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		78,168	34,391
Acquisition & Development | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		2,940	3,075
Acquisition & Development | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		1,224	1,496
Acquisition & Development | Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		1,532	2,132
Residential
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	211,846	211,846	174,507	152,168
Residential | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		208,667	171,395
Residential | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		2,075	2,147
Residential | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		1,047	965
Residential | Doubtful
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		57
Home Equity
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	65,645	65,645	45,935	43,605
Home Equity | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		65,320	45,684
Home Equity | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		262	223
Home Equity | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		63	28
Consumer
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans	$ 17,683	17,683	17,103	$ 18,062
Consumer | Pass
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		17,258	16,477
Consumer | Special Mention
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		424	624
Consumer | Substandard
Classes of the loan portfolio summarized by credit quality indicators:
Total Loans		$ 1	$ 2