Receivable from FDIC for Loss Share Agreements (Changes in Receivable from FDIC) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Jun. 30, 2013	Dec. 31, 2012		Jun. 30, 2012	Dec. 31, 2011
Receivable From FDIC For Loss Share Agreements [Abstract]
FDIC Indemnification Asset	$ 100,553	[1]	$ 329,619	$ 100,553	[1]	$ 329,619	$ 158,013	$ 270,192	[1]	$ 405,626	$ 617,377
Receivable From FDIC For Loss Share Agreements [Roll Forward]
Accretion of discounts and premiums, net	(20,553)		(32,398)	(65,734)		(79,135)
Receipt of payments from FDIC	1,431		(31,765)	(45,103)		(223,863)
Post-acquisition and other adjustments, net	$ (38,338)		$ (11,844)	$ (58,802)		$ 15,240

[1] Unaudited