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Loans (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Debt Instrument [Line Items]
Commercial loans	$ 179,877,000		$ 179,877,000		$ 153,043,000
Percent of participation agreement interest	80.00%		80.00%
Ownership interest in each loan is participates			20.00%
Cash payments of interest	57,000	50,000	114,000	118,000
Aggregate purchase price of loans, maximum			45,000,000
Percent of loans risk rated for capital adequacy			100.00%
Allocated specific reserves to modified TDRs	1,600,000		1,600,000		830,000
Total TDR's	6,600,000		6,600,000		7,000,000
Recorded investment	6,350,000	5,448,000	6,350,000	5,448,000
Principal repayment at the date of modification	50,000		50,000
Maturity date start			May 31, 2012
Maturity date end			Sep. 30, 2012
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum			3.50%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum			6.50%
Number of days of default payment			90 days
Accruing TDR's	3,848,000		3,848,000		3,684,000
Commercial Lines Of Credit [Member]
Debt Instrument [Line Items]
Commercial loans	12,538,000		12,538,000		11,782,000
Home Equity Line of Credit, Other [Member]
Debt Instrument [Line Items]
Commercial loans	11,658,000		11,658,000		10,447,000
Single-family residential [Member]
Debt Instrument [Line Items]
Mortgage loans	$ 35,763,000		$ 35,763,000		$ 25,373,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum				5.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum				10.00%
Previous maturity date of Receivables				2034
Maturity date of Receivables				2042
Reduction in stated interest rate of loan				30 years

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Percent Of Loans Held Risk Rated For Capital Adequacy

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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