Covered Assets and FDIC Loss-sharing Asset (FDIC Loss-sharing Asset) (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
(Amortization) accretion			$ 2,612	$ 10,105
Other	(1,755)	(629)	(3,842)	(2,529)
FDIC Loss-sharing Asset [Member]
Balance at beginning of period	209,694	226,745	205,991	0
Established through acquisitions	0	0	68,734	210,405
Cash received from the FDIC	(6,108)	(11,198)	(51,000)	(11,198)
FDIC reimbursable losses, net	1,138	416	2,192	13,357
(Amortization) accretion	(9,333)	2,401	(24,974)	6,353
Loan loss provision	921	0	2,424	0
Other	2,443	6,937	9,498	7,490
Balance at end of period	$ 193,869	$ 211,427	$ 193,869	$ 211,427

The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_DepreciationAmortizationAndAccretionNet
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration