Loans, Allowance For Credit Losses (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for loan losses:
Balance, beginning of year	$ 2,931	$ 2,641
Provision charged to expenses	306	888
Losses charged off	(456)	(579)
Recoveries	171	159
Balance, end of period	2,952	3,109
Ending balance:
Individually evaluated for impairment	461	556
Collectively evaluated for impairment	2,491	2,553
Loans:
Ending balance: Individually evaluated for impairment	16,096	13,233
Ending balance: Collectively evaluated for impairment	445,485	444,323
Totals	461,581	457,556	461,262
Commercial and Industrial [Member]
Allowance for loan losses:
Balance, beginning of year	162	305
Provision charged to expenses	(10)	321
Losses charged off	0	(251)
Recoveries	0	0
Balance, end of period	152	375
Ending balance:
Individually evaluated for impairment	0	133
Collectively evaluated for impairment	152	242
Loans:
Ending balance: Individually evaluated for impairment	242	780
Ending balance: Collectively evaluated for impairment	25,087	32,713
Totals	25,329	33,493
Commercial Secured By Real Estate [Member]
Allowance for loan losses:
Balance, beginning of year	1,941	1,625
Provision charged to expenses	(77)	279
Losses charged off	(206)	0
Recoveries	71	30
Balance, end of period	1,729	1,934
Ending balance:
Individually evaluated for impairment	83	341
Collectively evaluated for impairment	1,646	1,593
Loans:
Ending balance: Individually evaluated for impairment	10,232	11,920
Ending balance: Collectively evaluated for impairment	219,866	194,939
Totals	230,098	206,859
Residential Real Estate [Member]
Allowance for loan losses:
Balance, beginning of year	656	459
Provision charged to expenses	422	250
Losses charged off	(153)	(132)
Recoveries	7	4
Balance, end of period	932	581
Ending balance:
Individually evaluated for impairment	378	82
Collectively evaluated for impairment	554	499
Loans:
Ending balance: Individually evaluated for impairment	5,614	533
Ending balance: Collectively evaluated for impairment	182,380	187,248
Totals	187,994	187,781
Consumer [Member]
Allowance for loan losses:
Balance, beginning of year	166	246
Provision charged to expenses	(39)	23
Losses charged off	(57)	(138)
Recoveries	68	82
Balance, end of period	138	213
Ending balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	138	213
Loans:
Ending balance: Individually evaluated for impairment	8	0
Ending balance: Collectively evaluated for impairment	12,589	17,113
Totals	12,597	17,113
Agricultural [Member]
Allowance for loan losses:
Balance, beginning of year	0	0
Provision charged to expenses	0	0
Losses charged off	0	0
Recoveries	0	0
Balance, end of period	0	0
Ending balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Loans:
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	1,641	2,844
Totals	1,641	2,844
Other [Member]
Allowance for loan losses:
Balance, beginning of year	6	6
Provision charged to expenses	10	15
Losses charged off	(40)	(58)
Recoveries	25	43
Balance, end of period	1	6
Ending balance:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1	6
Loans:
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	3,922	9,466
Totals	$ 3,922	$ 9,466