Loans and Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2012	Dec. 31, 2013
Allowance for Loan Losses [Roll Forward]
Beginning balance	$ 6,667
Charge-offs	(229)	(1,505)
Recoveries	157	114
Provision (recovery)	0	1,800
Ending balance	6,595	6,258
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	2,493		1,313
Ending balances collectively evaluated for impairment	4,102		5,354
Loans receivable, individually evaluated for impairment	11,708		10,804
Loans receivable, collectively evaluated for impairment	426,165		440,573
Loans receivable, ending balance	437,873		451,377
Commercial and Industrial [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	964
Charge-offs	(91)	(257)
Recoveries	82	76
Provision (recovery)	(366)	213
Ending balance	589	932
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	237		211
Ending balances collectively evaluated for impairment	352		753
Loans receivable, individually evaluated for impairment	407		477
Loans receivable, collectively evaluated for impairment	24,169		24,269
Loans receivable, ending balance	24,576		24,746
Commercial Real Estate [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	2,320
Charge-offs	0	(686)
Recoveries	0	0
Provision (recovery)	(31)	1,321
Ending balance	2,289	1,685
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	1,085		505
Ending balances collectively evaluated for impairment	1,204		1,815
Loans receivable, individually evaluated for impairment	4,833		4,177
Loans receivable, collectively evaluated for impairment	159,151		172,143
Loans receivable, ending balance	163,984		176,320
Construction and Land [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	412
Charge-offs	0	0
Recoveries	65	0
Provision (recovery)	413	10
Ending balance	890	402
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	783		321
Ending balances collectively evaluated for impairment	107		91
Loans receivable, individually evaluated for impairment	3,946		3,980
Loans receivable, collectively evaluated for impairment	33,407		28,827
Loans receivable, ending balance	37,353		32,807
Consumer [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	18
Charge-offs	(12)	(104)
Recoveries	4	25
Provision (recovery)	4	57
Ending balance	14	40
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	0		0
Ending balances collectively evaluated for impairment	14		18
Loans receivable, individually evaluated for impairment	0		0
Loans receivable, collectively evaluated for impairment	3,576		3,810
Loans receivable, ending balance	3,576		3,810
Student US Government Guaranteed [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	196
Charge-offs	(126)	0
Recoveries	0	0
Provision (recovery)	11	196
Ending balance	81	0
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	0		0
Ending balances collectively evaluated for impairment	81		196
Loans receivable, individually evaluated for impairment	0		0
Loans receivable, collectively evaluated for impairment	22,113		27,962
Loans receivable, ending balance	22,113		27,962
Residential Real Estate [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	1,261
Charge-offs	0	(284)
Recoveries	3	2
Provision (recovery)	13	(148)
Ending balance	1,277	1,691
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	388		276
Ending balances collectively evaluated for impairment	889		985
Loans receivable, individually evaluated for impairment	2,452		2,100
Loans receivable, collectively evaluated for impairment	139,841		140,156
Loans receivable, ending balance	142,293		142,256
Unallocated Financing Receivables [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	182
Charge-offs	0	0
Recoveries	0	0
Provision (recovery)	286	10
Ending balance	468	172
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	0		0
Ending balances collectively evaluated for impairment	468		182
Home Equity Line of Credit [Member]
Allowance for Loan Losses [Roll Forward]
Beginning balance	1,314
Charge-offs	0	(174)
Recoveries	3	11
Provision (recovery)	(330)	141
Ending balance	987	1,336
Additional information on allowance for loan losses and recorded investment in loans receivable [Abstract]
Ending balances individually evaluated for impairment	0		0
Ending balances collectively evaluated for impairment	987		1,314
Loans receivable, individually evaluated for impairment	70		70
Loans receivable, collectively evaluated for impairment	43,908		43,406
Loans receivable, ending balance	$ 43,978		$ 43,476