Fair Value Measurement, Estimated Fair Values of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financial assets [Abstract]
Securities available for sale	$ 55,202	$ 53,571
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets [Abstract]
Cash and short-term investments	52,186	71,197
Securities available for sale	361	349
Restricted investments	0	0
Net Loans	0	0
Accrued interest receivable	0	0
Interest rate swaps	0	0
BOLI	0	0
Total assets at fair value	52,547	71,546
Liabilities [Abstract]
Deposits	0	0
Borrowings	0	0
Company obligated mandatorily redeemable capital securities		0
Accrued interest payable	0	0
Interest rate swaps	0	0
Total liabilities at fair value	0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets [Abstract]
Cash and short-term investments	0	0
Securities available for sale	54,841	53,222
Restricted investments	1,294	1,462
Net Loans	430,525	444,587
Accrued interest receivable	1,440	1,568
Interest rate swaps	37	96
BOLI	12,365	12,433
Total assets at fair value	500,502	513,368
Liabilities [Abstract]
Deposits	508,561	541,496
Borrowings	13,011	12,833
Company obligated mandatorily redeemable capital securities	4,117	4,117
Accrued interest payable	208	219
Interest rate swaps	321	223
Total liabilities at fair value	526,218	558,888
Significant Other Unobservable Inputs (Level 3) [Member]
Financial assets [Abstract]
Cash and short-term investments	0	0
Securities available for sale	0	0
Restricted investments	0	0
Net Loans	111	163
Accrued interest receivable	0	0
Interest rate swaps	0	0
BOLI	0	0
Total assets at fair value	111	163
Liabilities [Abstract]
Deposits	0	0
Borrowings	0	0
Company obligated mandatorily redeemable capital securities		0
Accrued interest payable	0	0
Interest rate swaps	0	0
Total liabilities at fair value	0	0
Carrying Amount [Member]
Financial assets [Abstract]
Cash and short-term investments	52,157	71,126
Securities available for sale	55,202	53,571
Restricted investments	1,294	1,462
Net Loans	431,278	444,710
Accrued interest receivable	1,440	1,568
Interest rate swaps	37	96
BOLI	12,365	12,433
Total assets at fair value	553,773	584,966
Liabilities [Abstract]
Deposits	507,819	540,204
Borrowings	13,092	13,139
Company obligated mandatorily redeemable capital securities	4,124	4,124
Accrued interest payable	208	219
Interest rate swaps	321	223
Total liabilities at fair value	525,564	557,909
Fair Value [Member]
Financial assets [Abstract]
Cash and short-term investments	52,186	71,197
Securities available for sale	55,202	53,571
Restricted investments	1,294	1,462
Net Loans	430,636	444,750
Accrued interest receivable	1,440	1,568
Interest rate swaps	37	96
BOLI	12,365	12,433
Total assets at fair value	553,160	585,077
Liabilities [Abstract]
Deposits	508,561	541,496
Borrowings	13,011	12,833
Company obligated mandatorily redeemable capital securities	4,117	4,117
Accrued interest payable	208	219
Interest rate swaps	321	223
Total liabilities at fair value	$ 526,218	$ 558,888