Loans Held For Sale (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Loans Held For Sale [Line Items]
Residential loans held for sale, at fair value	$ 4,528,000	$ 3,819,000
Proceeds from sale of loans and leases	5,364,000	3,627,000	259,127,000
Commercial And Commercial Real Estate Loans [Member]
Loans Held For Sale [Line Items]
Proceeds from sale of loans and leases	5,600,000	3,600,000
Income from sale of loan	200,000
Commercial and commercial real estate loans held for investment	5,400,000	3,200,000
Purchased impaired loans	100,000
Recoveries		$ 400,000