Loan Servicing (Schedule Of Change In Loan Servicing Rights) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Servicing Assets at Amortized Value [Line Items]
Balance at beginning of year	$ 12,491,000	$ 11,722,000	$ 9,824,000
Origination of loan servicing rights	4,483,000	4,182,000	5,012,000
Amortization expense	(4,074,000)	(3,413,000)	(3,114,000)
Balance at end of year	12,900,000	12,491,000	11,722,000
Balance at beginning of year	(1,163,000)	(612,000)	(532,000)
Impairment adjustment	(1,507,000)	(551,000)	(80,000)
Balance at end of year	(2,670,000)	(1,163,000)	(612,000)
Balance at end of year net of valuation allowance	10,230,000	11,328,000	11,110,000
Residential Mortgage Loans [Member]
Servicing Assets at Amortized Value [Line Items]
Aggregate principal balances of mortgage loans serviced	1,300,000,000	1,300,000,000	1,300,000,000
SBA Loans [Member]
Servicing Assets at Amortized Value [Line Items]
Total amount of loans serviced by bank	$ 33,100,000	$ 38,400,000	$ 37,800,000