This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References+ Details

- Definition

The aggregate carrying amount of loans receivable that will be sold to other entities. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market, or elected fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

+ References

Reference 1: 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(a))

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

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph d

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 65

-Paragraph 4, 5, 6, 7, 9, 12, 28, 29

-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 310

-SubTopic 10

-Section 35

-Paragraph 49

-URI http://asc.fasb.org/extlink&oid=6949992&loc=d3e3084-111518

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 a

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 310

-Section 30

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6490209&loc=d3e48214-111002

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Chapter V

-Section 563c.102

-Subsection I

-Paragraph 8

-Subparagraph h

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 65

-Paragraph 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

+ Details

- Definition

Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References+ Details

Fair Value of Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	$ 3,451,885	$ 6,533,874	$ 5,330,834
Loans Held for Sale	18,957	17,564
Quoted Prices in Active Markets for Identical Assets or Liabilities
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	822,508	553,894
Other Assets	11,082	10,851
Total Assets Measured at Fair Value on a Recurring Basis	833,590	564,745
Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	2,629,377	5,979,980
Loans Held for Sale	18,957
Net Derivative Assets and Liabilities	(805)	3,117
Total Assets Measured at Fair Value on a Recurring Basis	2,647,529	5,983,097
Significant Other Unobservable Inputs (Level 3)
Investment Securities Available-for-Sale:
Mortgage Servicing Rights	7,131	10,226
Net Derivative Assets and Liabilities	2,058	(332)
Total Assets Measured at Fair Value on a Recurring Basis	9,189	9,894
Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	3,451,885	6,533,874
Loans Held for Sale	18,957
Mortgage Servicing Rights	7,131	10,226
Other Assets	11,082	10,851
Net Derivative Assets and Liabilities	1,253	2,785
Total Assets Measured at Fair Value on a Recurring Basis	3,490,308	6,557,736
Debt Securities Issued by the U.S. Treasury and Government Agencies
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,231,018	555,856	720,792
Debt Securities Issued by the U.S. Treasury and Government Agencies \| Quoted Prices in Active Markets for Identical Assets or Liabilities
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	822,508	553,894
Debt Securities Issued by the U.S. Treasury and Government Agencies \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	408,510	1,962
Debt Securities Issued by the U.S. Treasury and Government Agencies \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,231,018	555,856
Debt Securities Issued by States and Political Subdivisions
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	407,059	113,609	54,116
Debt Securities Issued by States and Political Subdivisions \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	407,059	113,609
Debt Securities Issued by States and Political Subdivisions \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	407,059	113,609
Debt Securities Issued by Corporations
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	96,387
Debt Securities Issued by Corporations \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	96,387
Debt Securities Issued by Corporations \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	96,387
Debt Securities Issued by U.S. Government-Sponsored Enterprises
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale		505	792
Debt Securities Issued by U.S. Government-Sponsored Enterprises \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale		505
Debt Securities Issued by U.S. Government-Sponsored Enterprises \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale		505
Mortgage-Backed Securities Issued by Government Agencies
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,655,872	5,750,028	4,022,687
Mortgage-Backed Securities Issued by Government Agencies \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,655,872	5,750,028
Mortgage-Backed Securities Issued by Government Agencies \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,655,872	5,750,028
Mortgage-Backed Securities
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,717,421	5,863,904	4,555,134
Mortgage-Backed Securities \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,717,421	5,863,904
Mortgage-Backed Securities \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	1,717,421	5,863,904
Mortgage-Backed Securities Issued by U.S. Government-Sponsored Enterprises
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	61,549	113,876	532,447
Mortgage-Backed Securities Issued by U.S. Government-Sponsored Enterprises \| Significant Other Observable Inputs (Level 2)
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	61,549	113,876
Mortgage-Backed Securities Issued by U.S. Government-Sponsored Enterprises \| Total
Investment Securities Available-for-Sale:
Total Investment Securities Available-for-Sale	$ 61,549	$ 113,876