Loans (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	$ 8,628	$ 10,503	$ 8,628	$ 10,503
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	4,466	4,890	4,466	4,890
Impaired Financing Receivable, Unpaid Principal Balance, Total	13,094	15,393	13,094	15,393	6,809
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	6,365	7,379	6,365	7,379
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4,421	4,752	4,421	4,752
Impaired Financing Receivable, Recorded Investment, Total	10,786	12,131	10,786	12,131
Impaired Financing Receivable, with No Related Allowance, Allocated Loans and Leases
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	915	897	915	897
Impaired Financing Receivable Allocated Loans and Leases	915	897	915	897
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	6,410	1,051	6,181	1,098
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	4,155	6,933	4,161	7,909
Impaired Financing Receivable, Average Recorded Investment, Total	10,565	7,984	10,342	9,007
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	29	11	39	21
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	59		137
Impaired Financing Receivable, Interest Income, Accrual Method, Total	88	11	176	21
Land [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment				690
Originated for portfolio [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		135		135
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		135		135
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		136		136
Commercial [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	147	573	147	573
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	677	796	677	796
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	132	47	132	47
Impaired Financing Receivable, with Related Allowance, Recorded Investment	677	774	677	774
Impaired Financing Receivable, with No Related Allowance, Allocated Loans and Leases
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	569	624	569	624
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	133	154	89	149
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	679	1,112	687	1,487
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	9		22
Commercial [Member] | Non-owner occupied [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment			1,571	76
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment				1,938
Commercial [Member] | Owner Occupied [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment			422
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment				1,051
Single-family residential [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	130		130
Impaired Financing Receivable, with Related Allowance, Recorded Investment	130		130
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	49		49
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	131		111
Multi-family residential [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,970	6,742	4,970	6,742
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	90	94	90	94
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3,942	4,996	3,942	4,996
Impaired Financing Receivable, with Related Allowance, Recorded Investment	90	94	90	94
Impaired Financing Receivable, with No Related Allowance, Allocated Loans and Leases
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	12	11	12	11
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	3,955		4,099	47
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	90	3,147	91	3,433
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	29		39
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	2		3
Commercial [Member] | Non-owner occupied [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	2,672	2,177	2,672	2,177
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,684	2,823	2,684	2,823
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,882	1,755	1,882	1,755
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,684	2,823	2,684	2,823
Impaired Financing Receivable, with No Related Allowance, Allocated Loans and Leases
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	261	210	261	210
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,909	75
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,411	1,623	2,404
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	36		87
Commercial [Member] | Owner Occupied [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	839	876	839	876
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	405	411	405	411
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	409	446	409	446
Impaired Financing Receivable, with Related Allowance, Recorded Investment	405	411	405	411
Impaired Financing Receivable, with No Related Allowance, Allocated Loans and Leases
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	7	20	7	20
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	413
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	406	1,051	407
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	6		12
Commercial [Member] | Land [Member]
Individually evaluated for impairment by class of loans
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	480	766	480	766
Impaired Financing Receivable, with Related Allowance, Recorded Investment	435	650	435	650
Impaired Financing Receivable with Related Allowance, Allocated Loans and Leases	17	32	17	32
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		686
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	438		461
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		11
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	$ 6		$ 13