Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Covered
Beginning balance	$ 102,577	$ 148,599
Additions	29,370	20,532
Sales	(27,316)	(17,221)
Writedowns	(2,730)	(9,492)
Ending balance	101,901	142,418
Not covered
Beginning balance	43,513	50,399
Additions	8,638	6,308
Sales	(6,223)	(8,157)
Writedowns	(1,100)	(458)
Ending balance	44,828	48,092
Total
Beginning balance	146,090	198,998
Additions	38,008	26,840
Sales	(33,539)	(25,378)
Writedowns	(3,830)	(9,950)
Ending balance	$ 146,729	$ 190,510