Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 114,690	$ 115,092	$ 103,757
Loans charged off		104,532	99,713
Recoveries:		20,347	12,615
Net charge-offs		84,185	87,098
Provision for noncovered loan losses	62,900	83,783	98,433
Balance at end of period	107,699	114,690	115,092
C&I, CRE and Construction [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Loans charged off		42,937	42,276
Recoveries:		2,816	1,584
Residential Mortgages [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Loans charged off		5,156	4,960
Recoveries:		263	270
Installment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Loans charged off		34,054	31,622
Recoveries:		13,203	8,500
Home Equity Lines [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Loans charged off		7,912	7,200
Recoveries:		1,599	494
Credit cards [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Loans charged off		13,577	13,558
Recoveries:		2,199	1,710
Leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Loans charged off		896	97
Recoveries:		$ 267	$ 57

Reflects the net amount of other additions and reductions in the reserve for credit losses.

+ References+ Details

Reflects the amount charged against earnings during the period as bad debt expense, net of recoveries of previously expensed credit losses.

+ References+ Details

- Definition

Reflects a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts.

+ References+ Details

- Definition

Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

+ References+ Details

- Definition

The allowance for loan and lease losses represents the reserve to cover probable credit losses related to specifically identified loans and leases, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for loan losses in connection with business combinations determined to be appropriate.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Chapter V

-Section 563c.102

-Paragraph 8

-Subparagraph a(ii)

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 9

-Section 03

-Paragraph 7

-Subparagraph d

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 8, 9

-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 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

+ Details