Credit Quality of Loans and Allowance for Loan Losses, Allowance for Loan Losses by Segment (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	$ 7,370	$ 7,276
Charge-offs	(791)	(1,465)
Recoveries	152	161
Provision	1,800	1,250
Ending balance	8,531	7,222
Ending balance: individually evaluated for impairment	599	442
Ending balance: collectively evaluated for impairment	7,932	6,780
Loans [Abstract]
Ending balance	1,118,572	751,455	1,046,940	[1]
Ending balance: individually evaluated for impairment	5,805	7,660
Ending balance: collectively evaluated for impairment	1,111,767	743,795
Ending balance: loans acquired with deteriorated credit quality	1,000
Commercial, Financial and Agricultural [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	1,535	1,734
Charge-offs	(245)	(565)
Recoveries	39	103
Provision	2,364	384
Ending balance	3,693	1,656
Ending balance: individually evaluated for impairment	328	235
Ending balance: collectively evaluated for impairment	3,365	1,421
Loans [Abstract]
Ending balance	391,241	233,629
Ending balance: individually evaluated for impairment	1,648	2,088
Ending balance: collectively evaluated for impairment	389,593	231,541
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	(1,061)	357
Ending balance	1,091	2,027
Ending balance: individually evaluated for impairment	54	33
Ending balance: collectively evaluated for impairment	1,037	1,994
Loans [Abstract]
Ending balance	82,851	55,111
Ending balance: individually evaluated for impairment	262	576
Ending balance: collectively evaluated for impairment	82,589	54,535
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	15	0
Provision	80	246
Ending balance	2,243	1,966
Ending balance: individually evaluated for impairment	21	60
Ending balance: collectively evaluated for impairment	2,222	1,906
Loans [Abstract]
Ending balance	404,543	271,141
Ending balance: individually evaluated for impairment	2,556	2,974
Ending balance: collectively evaluated for impairment	401,277	268,167
Ending balance: loans acquired with deteriorated credit quality	710
Real Estate - Residential [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	936	936
Charge-offs	(115)	(84)
Recoveries	26	2
Provision	(328)	103
Ending balance	519	957
Ending balance: individually evaluated for impairment	68	15
Ending balance: collectively evaluated for impairment	451	942
Loans [Abstract]
Ending balance	141,689	112,343
Ending balance: individually evaluated for impairment	1,024	1,717
Ending balance: collectively evaluated for impairment	140,375	110,626
Ending balance: loans acquired with deteriorated credit quality	290
Consumer [Member]
Allowance for loan losses by portfolio [Roll Forward]
Beginning balance	543	710
Charge-offs	(413)	(321)
Recoveries	67	47
Provision	760	156
Ending balance	957	592
Ending balance: individually evaluated for impairment	128	99
Ending balance: collectively evaluated for impairment	829	493
Loans [Abstract]
Ending balance	90,571	72,859
Ending balance: individually evaluated for impairment	315	305
Ending balance: collectively evaluated for impairment	90,256	72,554
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	(17)	3
Ending balance	24	22
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	24	22
Loans [Abstract]
Ending balance	5,656	3,974
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	5,656	3,974
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	2,021	2,398
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	2,021	2,398
Ending balance: loans acquired with deteriorated credit quality	$ 0

[1] Derived from audited financial statements.