Loans (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Unpaid Principal Balance
Total with no related allowance recorded	$ 7,959		$ 7,959		$ 6,968
Total with an allowance recorded	1,161		1,161		5,168
Total	9,120		9,120		12,136
Recorded Investment
Total with no related allowance recorded	6,049		6,049		6,884
Total with an allowance recorded	1,161		1,161		4,934
Total	7,210	15,127	7,210	15,127	11,818
Total with an allowance recorded, Allowance for Loan Losses Allocated	730		730		2,456
Average impaired loans with interest recognized and cash-basis interest earned on impaired loans
Average of impaired loans during the period	8,267	15,086	9,794	17,050
Interest income during impairment			56
Commercial
Unpaid Principal Balance
Total with no related allowance recorded	2,923		2,923		1,999
Total with an allowance recorded	1,037		1,037		3,225
Recorded Investment
Total with no related allowance recorded	2,361		2,361		1,915
Total with an allowance recorded	1,037		1,037		2,991
Total with an allowance recorded, Allowance for Loan Losses Allocated	606		606		1,694
Average impaired loans with interest recognized and cash-basis interest earned on impaired loans
Average of impaired loans during the period	3,790	5,539	4,411	7,342
Interest income during impairment			56
Real estate | Commercial and residential
Unpaid Principal Balance
Total with no related allowance recorded	2,531		2,531		2,831
Total with an allowance recorded					1,531
Recorded Investment
Total with no related allowance recorded	1,672		1,672		2,831
Total with an allowance recorded					1,531
Total with an allowance recorded, Allowance for Loan Losses Allocated					451
Average impaired loans with interest recognized and cash-basis interest earned on impaired loans
Average of impaired loans during the period	2,273	5,032	3,034	5,061
Real estate | Land and construction
Unpaid Principal Balance
Total with no related allowance recorded	2,144		2,144		1,761
Recorded Investment
Total with no related allowance recorded	1,655		1,655		1,761
Average impaired loans with interest recognized and cash-basis interest earned on impaired loans
Average of impaired loans during the period	1,672	1,989	1,705	2,095
Real estate | Home Equity
Unpaid Principal Balance
Total with no related allowance recorded	355		355		377
Total with an allowance recorded	124		124		290
Recorded Investment
Total with no related allowance recorded	355		355		377
Total with an allowance recorded	124		124		290
Total with an allowance recorded, Allowance for Loan Losses Allocated	124		124		290
Average impaired loans with interest recognized and cash-basis interest earned on impaired loans
Average of impaired loans during the period	513	2,393	575	2,414
Consumer
Unpaid Principal Balance
Total with no related allowance recorded	6		6
Total with an allowance recorded					122
Recorded Investment
Total with no related allowance recorded	6		6
Total with an allowance recorded					122
Total with an allowance recorded, Allowance for Loan Losses Allocated					21
Average impaired loans with interest recognized and cash-basis interest earned on impaired loans
Average of impaired loans during the period	$ 19	$ 133	$ 69	$ 138