Loans Receivable (Schedule Of FDIC Loss Share Receivable) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Loans Receivable [Line Items]
Balance, beginning of year	$ 726,871
Acquisition	146,509	11,050
(Amortization) Accretion	(72,086)	(13,024)	2,788
Balance, end of year	591,844	726,871
FDIC Share-Loss [Member]
Loans Receivable [Line Items]
Balance, beginning of year	726,871	1,034,734
Acquisition		66,826
Increase due to loan loss provision recorded on FDIC covered loans	57,121	64,922
(Amortization) Accretion	(72,086)	(13,024)
Submission of reimbursable losses to the FDIC	(117,939)	(424,258)
Other	(2,123)	(2,329)
Balance, end of year	$ 591,844	$ 726,871