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Fair Value Part 3 (Details) (USD $) | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Securities held to maturity | $ 45,484,000 |  | $ 57,705,000 |
Net LHFI | 5,444,437,000 |  | 5,767,966,000 |
Net acquired loans | 143,270,000 |  | 76,302,000 |
FDIC indemnification assets | 23,979,000 |  | 28,348,000 | 0
Deposits | 7,804,041,000 |  | 7,566,363,000 |
Subordinated notes | 49,863,000 |  | 49,839,000 |
Junior subordinated debt securities | 61,856,000 |  | 61,856,000 |
Nonfinancial Assets and Liabilities [Abstract] |  |  |  |
Foreclosed assets measured at fair value | 32,400,000 | 49,000,000 |  |
Allowance for possible loan losses, Charge-offs | 8,500,000 | 6,000,000 |  |
Foreclosed assets re-measured after initial recognition | 29,700,000 | 56,800,000 |  |
Write-downs Of Allowance For Foreclosed Assets After Initial Recognition | 4,800,000 | 10,800,000 |  |
Outstanding balances in impaired loans | 36,500,000 |  | 68,900,000 |
Fair Value, Inputs, Level 2 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and short-term investments | 214,483,000 |  | 211,883,000 |
Securities held to maturity | 45,484,000 |  | 57,705,000 |
Deposits | 7,804,041,000 |  | 7,566,363,000 |
Short-term liabilities | 492,323,000 |  | 692,128,000 |
Subordinated notes | 49,863,000 |  | 49,839,000 |
Junior subordinated debt securities | 61,856,000 |  | 61,856,000 |
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash and short-term investments | 214,483,000 |  | 211,883,000 |
Securities held to maturity | 50,272,000 |  | 62,515,000 |
Deposits | 7,812,355,000 |  | 7,575,064,000 |
Short-term liabilities | 492,323,000 |  | 692,128,000 |
Subordinated notes | 53,457,000 |  | 51,438,000 |
Junior subordinated debt securities | 38,969,000 |  | 35,876,000 |
Fair Value, Inputs, Level 3 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Net LHFI | 5,444,437,000 |  | 5,767,966,000 |
Net acquired loans | 143,270,000 |  | 76,302,000 |
FDIC indemnification assets | 23,979,000 |  | 28,348,000 |
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Net LHFI | 5,528,840,000 |  | 5,848,791,000 |
Net acquired loans | 143,270,000 |  | 76,302,000 |
FDIC indemnification assets | $ 23,979,000 |  | $ 28,348,000 |

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- Definition 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 element represents the initial fair value of foreclosed assets. + References No definition available. + Details
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- Definition The (re)measured fair value amount, as of the balance sheet date, of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts + References No definition available. + Details
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- Definition The overvalued amount that is written down to reduce the carrying value of an asset, that was valued at initial recognition of foreclosure, to the fair value. + References No definition available. + Details
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- Definition 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 includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 8, 9, 10 -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 Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8 -Footnote 2 -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. + Details
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- Definition For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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- Definition Reflects the aggregate carrying amount of all categories of loans and leases held in portfolio, net of unearned income and the allowance for losses on loans and leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -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 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 3: 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) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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