Loans Receivable (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2012 loan	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Loans held for sale	$ 33,601,000		$ 33,601,000	$ 55,601,000
Transfer from loans held for sale	14,185,000		14,185,000
Small business loans charged down			1,300,000
Reduction in allowance for loan losses			1,100,000
Commerical loan 90 days past due and still accruing	80,000		80,000
Loans charged off subsequent to change in valuation of collateral dependent loans		66,500,000
Period of evaluation for impairment prior to appraisal date			1 year
Period of appraisal postponement if property is in the process of foreclosure			1 year
Period of adjusting appraisals			6 months
Collateral Dependent Loans	138,200,000		138,200,000
Collateral Dependent Loans Measured For Impairment Using Current Appraisals	50,200,000		50,200,000
Collateral Dependent Loans Measured For Impairment Using Previous Appraisals	88,000,000		88,000,000
Number of loans adjusted down due from changes in market conditions since last appraisal			3
Collateral Dependent Loans Measured For Impairment Using Previous Appraisals Adjustment	1,000,000		1,000,000
Commitment To Lend Additional Funds On Impaired Loans	200,000		200,000
Loans Originated Excluded From Valuation	9,200,000		9,200,000	78,800,000
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for sale	14,500,000		14,500,000	35,800,000
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans held for sale	19,100,000		19,100,000	19,800,000
Transfer from loans held for sale			$ 14,200,000