Loans Receivable (Schedule Of FDIC Loss Share Receivable) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Loans Receivable [Line Items]
(Amortization) Accretion	$ (27,927)	$ (21,913)
FDIC Share-Loss [Member]
Loans Receivable [Line Items]
Balance, beginning of year	591,844	726,871
Increase due to loan loss provision recorded on FDIC covered loans	684	6,784
FDIC Loss Share Receivable	537,448	689,004
FDIC loss share receivable	537,448	689,004
(Amortization) Accretion	(27,927)	(21,913)
Submission of reimbursable losses to the FDIC	(28,418)	(23,848)
Other	1,265	1,110
Balance, end of year	$ 537,448	$ 689,004