Loans and Allowance for Loan and Lease Losses (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Allowance for loan losses and recorded investment in loans and impairment methods
Balance at beginning of year	$ 4,239	$ 4,132
Provision (credit) for losses	255	255
Charge-offs	(625)	(365)
Recoveries	57	10
Balance at end of period	3,926	4,032
Ending allowance balance: Individually evaluated for impairment	1,411		1,818
Ending allowance balance: Collectively evaluated for impairment	2,515		2,421
Ending loan balance: Individually evaluated for impairment	17,199		18,305
Ending loan balance: Collectively evaluated for impairment	307,374		299,982
Total	324,573		318,287
Commercial Real Estate Loans [Member]
Allowance for loan losses and recorded investment in loans and impairment methods
Balance at beginning of year	789	584
Provision (credit) for losses	(7)	(60)
Charge-offs	(479)
Recoveries
Balance at end of period	303	524
Ending allowance balance: Individually evaluated for impairment	129		626
Ending allowance balance: Collectively evaluated for impairment	174		163
Ending loan balance: Individually evaluated for impairment	4,996		5,483
Ending loan balance: Collectively evaluated for impairment	102,971		95,623
Total	107,967		101,106
Residential Real Estate Loans [Member]
Allowance for loan losses and recorded investment in loans and impairment methods
Balance at beginning of year	1,504	1,539
Provision (credit) for losses	206	184
Charge-offs	(71)	(250)
Recoveries	34	3
Balance at end of period	1,673	1,476
Ending allowance balance: Individually evaluated for impairment	634		523
Ending allowance balance: Collectively evaluated for impairment	1,039		981
Ending loan balance: Individually evaluated for impairment	7,136		7,430
Ending loan balance: Collectively evaluated for impairment	159,477		160,568
Total	166,613		167,998
Construction Real Estate Loans [Member]
Allowance for loan losses and recorded investment in loans and impairment methods
Balance at beginning of year	785	1,150
Provision (credit) for losses	(85)	(74)
Charge-offs		(10)
Recoveries	8
Balance at end of period	708	1,066
Ending allowance balance: Individually evaluated for impairment	307		338
Ending allowance balance: Collectively evaluated for impairment	401		447
Ending loan balance: Individually evaluated for impairment	4,075		4,282
Ending loan balance: Collectively evaluated for impairment	10,884		10,604
Total	14,959		14,886
Commercial Loans and Leases [Member]
Allowance for loan losses and recorded investment in loans and impairment methods
Balance at beginning of year	1,080	760
Provision (credit) for losses	83	184
Charge-offs	(4)	(89)
Recoveries	2	1
Balance at end of period	1,161	856
Ending allowance balance: Individually evaluated for impairment	330		319
Ending allowance balance: Collectively evaluated for impairment	831		761
Ending loan balance: Individually evaluated for impairment	944		1,047
Ending loan balance: Collectively evaluated for impairment	30,963		29,887
Total	31,907		30,934
Municipal Loans [Member]
Allowance for loan losses and recorded investment in loans and impairment methods
Ending loan balance: Collectively evaluated for impairment	1,177		1,187
Total	1,177		1,187
Consumer Loans [Member]
Allowance for loan losses and recorded investment in loans and impairment methods
Balance at beginning of year	81	99
Provision (credit) for losses	58	21
Charge-offs	(71)	(16)
Recoveries	13	6
Balance at end of period	81	110
Ending allowance balance: Individually evaluated for impairment	11		12
Ending allowance balance: Collectively evaluated for impairment	70		69
Ending loan balance: Individually evaluated for impairment	48		63
Ending loan balance: Collectively evaluated for impairment	1,902		2,113
Total	$ 1,950		$ 2,176