Receivable from FDIC for Loss Share Agreements (Changes in Receivable from FDIC) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Receivable From FDIC For Loss Share Agreements [Roll Forward]
Balance at beginning of period	$ 195,942		$ 492,384		$ 270,192	[1]	$ 617,377
Accretion of discounts and premiums, net	(19,069)		(26,674)		(45,181)		(46,737)
Receipt of payments from FDIC	(4,015)		(68,894)		(46,534)		(192,098)
Post-acquisition and other adjustments, net	(14,845)		8,810		(20,464)		27,084
Balance at end of period	$ 158,013	[2]	$ 405,626	[2]	$ 158,013	[2]	$ 405,626	[2]

[1] Derived from 2012 Annual Report on Form 10-K.

[2] Unaudited