Loans and Allowance for Loan Losses - Summary of Outstanding Loan Balances (Accruing and Non - Accruing) Categorized by Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	$ 1,100,138		$ 1,051,859
Total Allowance	16,152	$ 15,723	15,557	$ 15,655	$ 15,297	$ 15,151
Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	592,253		577,804
Total Allowance	6,869	6,692	6,783	5,184	5,564	5,181
Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	212,937		179,664
Total Allowance	4,725	4,344	3,984	3,852	4,125	4,425
Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	71,768		71,169
Total Allowance	628	595	603	692	670	671
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	14,617		14,945
Total Allowance	162	171	246	233	256	266
Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,057,988		1,000,884
Special Mention
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	21,503		26,588
Substandard and Doubtful
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	20,647		24,387
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	805,190		757,468
Total Allowance	11,594		10,767
Commercial Real Estate | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	592,253		577,804
Total Allowance	6,869		6,783
Commercial Real Estate | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	212,937		179,664
Total Allowance	4,725		3,984
Commercial Real Estate | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	775,270		723,369
Commercial Real Estate | Pass | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	568,323		551,001
Commercial Real Estate | Pass | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	206,947		172,368
Commercial Real Estate | Special Mention
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	18,459		19,260
Commercial Real Estate | Special Mention | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	15,842		16,326
Commercial Real Estate | Special Mention | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,617		2,934
Commercial Real Estate | Substandard and Doubtful
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	11,461		14,839
Commercial Real Estate | Substandard and Doubtful | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	8,088		10,477
Commercial Real Estate | Substandard and Doubtful | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	3,373		4,362
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	208,563		208,277
Total Allowance	3,768	$ 3,921	3,941	$ 5,694	$ 4,682	$ 4,608
Commercial and Industrial | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	200,441		195,611
Commercial and Industrial | Special Mention
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	986		5,626
Commercial and Industrial | Substandard and Doubtful
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	7,136		7,040
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	86,385		86,114
Total Allowance	790		849
Consumer | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	71,768		71,169
Total Allowance	628		603
Consumer | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	14,617		14,945
Total Allowance	162		246
Consumer | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	82,277		81,904
Consumer | Pass | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	67,771		67,088
Consumer | Pass | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	14,506		14,816
Consumer | Special Mention
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,058		1,702
Consumer | Special Mention | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,045		1,666
Consumer | Special Mention | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	13		36
Consumer | Substandard and Doubtful
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,050		2,508
Consumer | Substandard and Doubtful | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,952		2,415
Consumer | Substandard and Doubtful | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	$ 98		$ 93