Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012
Covered
Beginning balance	$ 102,577	[1]	$ 148,599
Additions	41,315		61,630
Sales	(53,676)		(81,589)
Writedowns	(5,383)		(11,259)
Ending balance	84,833	[2]	117,381	[2]
Noncovered
Beginning balance	43,513	[1]	50,399
Additions	16,615		18,783
Sales	(21,026)		(16,616)
Writedowns	(2,160)		(3,112)
Ending balance	36,942	[2]	49,454	[2]
Total
Beginning balance	146,090		198,998
Additions	57,930		80,413
Sales	(74,702)		(98,205)
Writedowns	(7,543)		(14,371)
Ending balance	$ 121,775		$ 166,835

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

[2] Unaudited