Allowance for Loan Losses and Reserve for Unfunded Lending Commitments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2013
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year			$ 12,600	$ 12,118
Provision for loan losses	0	0	150	294	294
Charge-offs	(398)		(398)	(629)	(837)
Recoveries	268		268	901	1,025
Balance, end of year	12,620	12,684	12,620	12,684	12,118
Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment	646		646			559
Collectively evaluated for impairment	11,499		11,499			11,610
Loans acquired with deteriorated credit quality	475		475			431
Total	12,620	12,684	12,620	12,684	12,118
Reserve for Unfunded Lending Commitments [Abstract]
Balance, beginning of year			210	201
Provision for loan losses			(55)	1	9
Charge-offs			0	0	0
Balance, end of year	155	202	155	202	201
Loans [Abstract]
Individually evaluated for impairment	4,806		4,806			6,029
Collectively evaluated for impairment	796,935		796,935			771,998
Loans acquired with deteriorated credit quality	14,847		14,847			16,644
Total Loans	816,588		816,588			794,671
Commercial [Member]
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year			1,810
Provision for loan losses			70		154
Charge-offs			(101)		(129)
Recoveries			42		335
Balance, end of year	1,821		1,821		1,450
Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment	0		0			0
Collectively evaluated for impairment	1,818		1,818			1,810
Loans acquired with deteriorated credit quality	3		3			0
Total	1,821		1,821		1,450
Loans [Abstract]
Individually evaluated for impairment	9		9			19
Collectively evaluated for impairment	126,386		126,386			122,424
Loans acquired with deteriorated credit quality	42		42			110
Total Loans	126,437		126,437			122,553
Commercial Real Estate [Member]
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year			6,819
Provision for loan losses			139		(162)
Charge-offs			0		(164)
Recoveries			51		323
Balance, end of year	7,009		7,009		6,822
Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment	642		642			556
Collectively evaluated for impairment	6,118		6,118			6,039
Loans acquired with deteriorated credit quality	249		249			224
Total	7,009		7,009		6,822
Loans [Abstract]
Individually evaluated for impairment	4,059		4,059			4,688
Collectively evaluated for impairment	405,601		405,601			392,720
Loans acquired with deteriorated credit quality	9,143		9,143			9,030
Total Loans	418,803		418,803			406,438
Residential Real Estate [Member]
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year			3,690
Provision for loan losses			156		177
Charge-offs			(240)		(369)
Recoveries			113		244
Balance, end of year	3,719		3,719		3,638
Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment	1		1			0
Collectively evaluated for impairment	3,495		3,495			3,483
Loans acquired with deteriorated credit quality	223		223			207
Total	3,719		3,719		3,638
Loans [Abstract]
Individually evaluated for impairment	720		720			1,304
Collectively evaluated for impairment	259,661		259,661			250,906
Loans acquired with deteriorated credit quality	5,662		5,662			7,504
Total Loans	266,043		266,043			259,714
Consumer [Member]
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year			99
Provision for loan losses			(33)		(57)
Charge-offs			(57)		(175)
Recoveries			62		123
Balance, end of year	71		71		208
Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment	3		3			3
Collectively evaluated for impairment	68		68			96
Loans acquired with deteriorated credit quality	0		0			0
Total	71		71		208
Loans [Abstract]
Individually evaluated for impairment	18		18			18
Collectively evaluated for impairment	5,287		5,287			5,948
Loans acquired with deteriorated credit quality	0		0			0
Total Loans	5,305		5,305			5,966
Unallocated Financing Receivables [Member]
Allowance for Loan Losses [Roll Forward]
Balance, beginning of year			182
Provision for loan losses			(182)		182
Charge-offs			0		0
Recoveries			0		0
Balance, end of year	0		0		0
Allowance for Credit Loss, Additional Information [Abstract]
Individually evaluated for impairment	0		0			0
Collectively evaluated for impairment	0		0			182
Loans acquired with deteriorated credit quality	0		0			0
Total	0		0		0
Loans [Abstract]
Individually evaluated for impairment	0		0			0
Collectively evaluated for impairment	0		0			0
Loans acquired with deteriorated credit quality	0		0			0
Total Loans	$ 0		$ 0			$ 0