Credit Quality of Loans and Allowance for Loan Losses, Allowance for Loan Losses by Segment (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	$ 7,370	$ 7,276
Charge-offs	(1,166)	(1,699)
Recoveries	213	247
Provision	2,250	1,550
Ending balance	8,667	7,374
Ending balance: individually evaluated for impairment	698	660
Ending balance: collectively evaluated for impairment	7,969	6,714
Loans [Abstract]
Ending balance	1,145,023	808,833	1,046,940	[1]
Ending balance: individually evaluated for impairment	5,215	8,442
Ending balance: collectively evaluated for impairment	1,138,792	800,391
Ending balance: loans acquired with deteriorated credit quality	1,016
Commercial, Financial and Agricultural [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	1,535	1,734
Charge-offs	(461)	(683)
Recoveries	61	169
Provision	3,090	574
Ending balance	4,225	1,794
Ending balance: individually evaluated for impairment	419	461
Ending balance: collectively evaluated for impairment	3,806	1,333
Loans [Abstract]
Ending balance	423,073	266,046
Ending balance: individually evaluated for impairment	1,450	2,302
Ending balance: collectively evaluated for impairment	421,623	263,744
Ending balance: loans acquired with deteriorated credit quality	0
Real Estate - Construction [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	2,147	1,661
Charge-offs	0	0
Recoveries	5	9
Provision	(1,081)	378
Ending balance	1,071	2,048
Ending balance: individually evaluated for impairment	36	40
Ending balance: collectively evaluated for impairment	1,035	2,008
Loans [Abstract]
Ending balance	76,213	57,727
Ending balance: individually evaluated for impairment	164	926
Ending balance: collectively evaluated for impairment	76,049	56,801
Ending balance: loans acquired with deteriorated credit quality	0
Real Estate - Commercial [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	2,166	2,215
Charge-offs	(18)	(495)
Recoveries	21	0
Provision	(661)	282
Ending balance	1,508	2,002
Ending balance: individually evaluated for impairment	54	64
Ending balance: collectively evaluated for impairment	1,454	1,938
Loans [Abstract]
Ending balance	401,080	293,579
Ending balance: individually evaluated for impairment	2,285	3,144
Ending balance: collectively evaluated for impairment	398,080	290,435
Ending balance: loans acquired with deteriorated credit quality	715
Real Estate - Residential [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	936	936
Charge-offs	(129)	(126)
Recoveries	34	3
Provision	(46)	114
Ending balance	795	927
Ending balance: individually evaluated for impairment	55	0
Ending balance: collectively evaluated for impairment	740	927
Loans [Abstract]
Ending balance	142,431	110,735
Ending balance: individually evaluated for impairment	994	1,771
Ending balance: collectively evaluated for impairment	141,136	108,964
Ending balance: loans acquired with deteriorated credit quality	301
Consumer [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	543	710
Charge-offs	(558)	(395)
Recoveries	92	66
Provision	962	197
Ending balance	1,039	578
Ending balance: individually evaluated for impairment	134	95
Ending balance: collectively evaluated for impairment	905	483
Loans [Abstract]
Ending balance	94,722	73,334
Ending balance: individually evaluated for impairment	322	299
Ending balance: collectively evaluated for impairment	94,400	73,035
Ending balance: loans acquired with deteriorated credit quality	0
Finance Leases Commercial [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	41	19
Charge-offs	0	0
Recoveries	0	0
Provision	(16)	4
Ending balance	25	23
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	25	23
Loans [Abstract]
Ending balance	5,340	5,041
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	5,340	5,041
Ending balance: loans acquired with deteriorated credit quality	0
Other [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	2	1
Charge-offs	0	0
Recoveries	0	0
Provision	2	1
Ending balance	4	2
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	4	2
Loans [Abstract]
Ending balance	2,164	2,371
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	2,164	2,371
Ending balance: loans acquired with deteriorated credit quality	$ 0

[1] Derived from audited financial statements.