Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Covered
Beginning balance	$ 102,577	[1]	$ 148,599
Additions	50,365		89,811
Sales	(78,597)		(100,620)
Writedowns	(15,576)		(21,385)
Ending balance	58,769	[2]	116,405	[2]
Noncovered
Beginning balance	43,513	[1]	50,399
Additions	28,756		27,552
Sales	(29,266)		(24,960)
Writedowns	(2,665)		(7,928)
Ending balance	40,338	[2]	45,063	[2]
Total
Beginning balance	146,090		198,998
Additions	79,121		117,363
Sales	(107,863)		(125,580)
Writedowns	(18,241)		(29,313)
Ending balance	$ 99,107		$ 161,468

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

[2] Unaudited