Fair Value of Assets and Liabilities, Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financial assets:
Securities available for sale	$ 152,817	$ 144,646
Carrying Amount [Member]
Financial assets:
Cash and short-term investments	25,620	11,507
Securities available for sale	152,817	144,646
Loans, net	640,283	616,984
Loans held-for-sale, net	72,727	70,062
Accrued interest receivable	5,673	5,242
Financial liabilities:
Demand deposits	399,575	338,473
Time deposits	286,609	307,943
Borrowings	162,746	161,151
Derivative payable	513	515
Accrued interest payable	837	1,111
Estimated Fair Value [Member] | Level 1 [Member]
Financial assets:
Cash and short-term investments	25,620	11,507
Loans, net	0	0
Loans held-for-sale, net	0	0
Accrued interest receivable	5,673	5,242
Financial liabilities:
Demand deposits	399,575	338,473
Time deposits	0	0
Borrowings	0	0
Accrued interest payable	837	1,111
Estimated Fair Value [Member] | Level 2 [Member]
Financial assets:
Cash and short-term investments	0	0
Securities available for sale	152,817	144,646
Loans, net	0	0
Loans held-for-sale, net	74,964	72,859
Accrued interest receivable	0	0
Financial liabilities:
Demand deposits	0	0
Time deposits	290,483	312,095
Borrowings	158,027	157,863
Derivative payable	513	515
Accrued interest payable	0	0
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets:
Cash and short-term investments	0	0
Loans, net	651,133	624,219
Loans held-for-sale, net	0	0
Accrued interest receivable	0	0
Financial liabilities:
Demand deposits	0	0
Time deposits	0	0
Borrowings	0	0
Accrued interest payable	0	0
Estimated Fair Value [Member]
Financial assets:
Cash and short-term investments	25,620	11,507
Securities available for sale	152,817	144,646
Loans, net	651,133	624,219
Loans held-for-sale, net	74,964	72,859
Accrued interest receivable	5,673	5,242
Financial liabilities:
Demand deposits	399,575	338,473
Time deposits	290,483	312,095
Borrowings	158,027	157,863
Derivative payable	513	515
Accrued interest payable	$ 837	$ 1,111