Loans Receivable (Schedule Of Carrying Amount Of Loans Acquired) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Loans Receivable [Line Items]
Contractually required principal and interest at acquisition	$ 1,064,426		$ 254,977
Nonaccretable difference (expected losses and foregone interest)	(107,651)		(92,726)
Cash flows expected to be collected at acquisition	956,775		162,251
Accretable yield	(146,509)		(11,050)
Basis in acquired loans at acquisition	810,226	[1]	151,201	[1]
Acquired Impaired Loans [Member]
Loans Receivable [Line Items]
Contractually required principal and interest at acquisition	88,556		49,823
Nonaccretable difference (expected losses and foregone interest)	(34,824)		(30,890)
Cash flows expected to be collected at acquisition	53,732		18,933
Accretable yield	(7,346)		(207)
Basis in acquired loans at acquisition	46,386		18,726
Acquired Performing Loans [Member]
Loans Receivable [Line Items]
Contractually required principal and interest at acquisition	975,870		205,154
Nonaccretable difference (expected losses and foregone interest)	(72,827)		(61,836)
Cash flows expected to be collected at acquisition	903,043		143,318
Accretable yield	(139,163)		(10,843)
Basis in acquired loans at acquisition	$ 763,880		$ 132,475

[1] Excludes overdraft balances, credit card loans, and in-process accounts included in total loans at the acquisition date.