Loans, Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Allowance for loan losses [Roll Forward]
Balance, beginning of year	$ 3,588	$ 3,437
Provision charged to expenses	81	149
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	(363)	(219)
Recoveries	64	37
Balance, end of period	3,370	3,404
Individually evaluated for impairment	815	885
Collectively evaluated for impairment	2,555	2,519
Balance, end of period	3,370	3,404
Loans:
Individually evaluated for impairment	16,606	15,488
Collectively evaluated for impairment	648,487	534,179
Acquired credit impaired loans	20,103
Balance, end of period	685,196	549,667	574,354
Commercial and Industrial [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of year	175	320
Provision charged to expenses	(109)	20
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	0	(83)
Recoveries	6	0
Balance, end of period	72	257
Individually evaluated for impairment	0	71
Collectively evaluated for impairment	72	186
Balance, end of period	72	257
Loans:
Individually evaluated for impairment	164	181
Collectively evaluated for impairment	38,123	35,234
Acquired credit impaired loans	1,803
Balance, end of period	40,090	35,415	29,306
Commercial Secured By Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of year	2,520	2,296
Provision charged to expenses	213	87
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	(203)	(30)
Recoveries	0	0
Balance, end of period	2,530	2,353
Individually evaluated for impairment	648	657
Collectively evaluated for impairment	1,882	1,696
Balance, end of period	2,530	2,353
Loans:
Individually evaluated for impairment	14,448	14,006
Collectively evaluated for impairment	349,549	268,838
Acquired credit impaired loans	11,723
Balance, end of period	375,720	282,844	313,913
Residential Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of year	826	712
Provision charged to expenses	(25)	14
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	(119)	(27)
Recoveries	21	5
Balance, end of period	703	704
Individually evaluated for impairment	167	157
Collectively evaluated for impairment	536	547
Balance, end of period	703	704
Loans:
Individually evaluated for impairment	1,977	1,294
Collectively evaluated for impairment	230,410	213,190
Acquired credit impaired loans	6,116
Balance, end of period	238,503	214,484	215,842
Consumer [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of year	66	108
Provision charged to expenses	(3)	22
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	(23)	(63)
Recoveries	24	23
Balance, end of period	64	90
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	64	90
Balance, end of period	64	90
Loans:
Individually evaluated for impairment	17	7
Collectively evaluated for impairment	20,844	13,966
Acquired credit impaired loans	218
Balance, end of period	21,079	13,973	12,730
Agricultural [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of year	0	0
Provision charged to expenses	0	0
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	0	0
Recoveries	0	0
Balance, end of period	0	0
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Balance, end of period	0	0
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	7,639	1,805
Acquired credit impaired loans	243
Balance, end of period	7,882	1,805	2,472
Other [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of year	1	1
Provision charged to expenses	5	6
Losses Charged Off [Abstract]
Acquired credit impaired loans	0
Other loans	(18)	(16)
Recoveries	13	9
Balance, end of period	1	0
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1	0
Balance, end of period	1	0
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,922	1,146
Acquired credit impaired loans	0
Balance, end of period	$ 1,922	$ 1,146	$ 91