Merger with MidCarolina (Details) (USD $)	12 Months Ended						12 Months Ended
	Dec. 31, 2013 Branch	Dec. 31, 2012 Branch	Dec. 31, 2011	Dec. 31, 2013 MidCarolina [Member]	Dec. 31, 2012 MidCarolina [Member]	Jul. 01, 2011 MidCarolina [Member]	Dec. 31, 2011 Marketing and Advertising Expense [Member]	Dec. 31, 2011 Professional Fees [Member]	Dec. 31, 2011 Technology and Communications [Member]	Dec. 31, 2011 Other Noninterest Expense [Member]	Dec. 31, 2013 Series A Preferred Stock [Member] MidCarolina [Member]
Merger with MidCarolina [Abstract]
Effective date of completion of merger	Jul. 01, 2011
Date of acquisition agreement	Dec. 15, 2010
Number of branches added during expansion of business	8	8
Number of shares received by the stockholder of acquiree entity in exchange of acquirer entity's common stock (in shares)	0.33
Shares exchange ratio on acquisition	33.00%
Number of additional common stock issued in connection with merger (in shares)	1,626,157
Amortization period of core deposit	9 years			108 months
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Number of perpetual Series A preferred stock received in exchange on merger (in shares)											1
Consideration Paid [Abstract]
Common shares issued (1,626,157)	$ 0	$ 0	$ 29,905,000			$ 29,905,000
Cash paid to Shareholders						12,000
Fair Value of Options	0	0	132,000			132,000
Preferred shares issued (5,000)	0	0	5,000,000			5,000,000
Value of consideration						35,049,000
Assets acquired [Abstract]
Cash and cash equivalents						34,783,000
Investment securities	0	0	51,442,000			51,442,000
Loans held for sale	0	0	113,000			113,000
Loans, net of unearned income	0	0	328,123,000			328,123,000
Premises and equipment, net	0	0	5,708,000			5,708,000
Deferred income taxes	0	0	15,310,000			15,310,000
Core deposit intangible	0	0	6,556,000	6,556,000,000		6,556,000
Other real estate owned	0	0	3,538,000			3,538,000
Other assets	0	0	13,535,000			13,535,000
Total assets						459,108,000
Liabilities assumed [Abstract]
Deposits						420,248,000
FHLB advances	0	0	9,858,000			9,858,000
Other borrowings	0	0	6,546,000			6,546,000
Other liabilities	0	0	3,838,000			3,982,000
Total Liabilities						440,634,000
Net assets acquired						18,474,000
Goodwill resulting from merger with MidCarolina	39,043,000	39,043,000			16,575,000	16,575,000
Preferred shares issued (in shares)	5,000
Changes in the fair value of net assets acquired and liabilities assumed [Abstract]
Goodwill, beginning of period	39,043,000			16,575,000	16,575,000	16,575,000
Effect of adjustments to [Abstract]
Other liabilities					144,000
Goodwill, end of period	39,043,000	39,043,000			16,575,000	16,575,000
Direct costs related to acquisition expense	0	19,000	1,607,000				22,000	1,300,000	130,000	26,000
Acquired loan portfolio at fair value	367,400
Discount on acquired loan portfolio at fair value	39,900
Performing portion of acquired loan portfolio estimated at fair value	286,500
Details the acquired loans that are accounted for in accordance with FASB ASC 310-30 [Abstract]
Contractually required principal and interest at acquisition	56,681,000
Contractual cash flows not expected to be collected (nonaccretable difference)	17,472,000
Expected cash flows at acquisition	39,209,000
Interest component of expected cash flows (accretable discount)	1,663,000
Fair value of acquired loans accounted for under FASB ASC 310-30	37,546,000
Unaudited pro forma information related to merger [Abstract]
Net interest income	40,959,000	44,954,000	50,781,000
Provision for loan loss	294,000	2,133,000	5,570,000
Non-interest income	10,827,000	11,410,000	10,299,000
Non-interest expense	34,780,000	35,991,000	37,542,000
Income taxes	3,861,000	3,649,000	5,321,000
Net income	$ 12,851,000	$ 14,591,000	$ 12,647,000