Other Assets (Schedule Of Other Assets) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Other Assets [Abstract]
Cash surrender value of life insurance policies	$ 92,555,000	$ 90,161,000
Accrued interest receivable	30,617,000	30,307,000
Due from FDIC	26,510,000	36,461,000
Prepaid FDIC deposit assessment	18,739,000	29,369,000
Income taxes receivable	14,715,000	516,000
Equity method investments	12,400,000	8,377,000
Derivative assets	7,955,000	1,060,000
Investment in unconsolidated Trusts	6,934,000	6,933,000
Deferred tax assets, net		9,649,000
Other	37,181,000	29,632,000
Total	247,606,000	242,465,000
Capital commitments relating to investments	$ 6,900,000	$ 1,900,000