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Estimated Fair Values (Tables) | 3 Months Ended
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Mar. 31, 2014
Fair Value Disclosures [Abstract] |
Estimated Fair Values For Certain Financial Assets And Financial Liabilities | For all other financial assets and financial liabilities, the carrying value is a reasonable estimate of the fair value as of March 31, 2014 and December 31, 2013. The carrying value and fair value for these assets and liabilities are equivalent because they are relatively short term in nature and there is no interest rate or credit risk that would cause the fair value to differ from the carrying value.
(Dollars in thousands) | March 31, 2014 |  | December 31, 2013
Carrying value |  | Fair value |  | Carrying value |  | Fair value
Cash and due from banks | $ | 543,471 |  |  | $ | 543,471 |  |  | $ | 533,599 |  |  | $ | 533,599 |
Overnight investments | 1,161,469 |  |  | 1,161,469 |  |  | 859,324 |  |  | 859,324 |
Investment securities available for sale | 5,676,237 |  |  | 5,676,237 |  |  | 5,387,703 |  |  | 5,387,703 |
Investment securities held to maturity | 782 |  |  | 835 |  |  | 907 |  |  | 974 |
Loans held for sale | 53,361 |  |  | 54,057 |  |  | 47,271 |  |  | 47,956 |
Acquired loans, net of allowance for loan and lease losses | 1,225,825 |  |  | 1,201,309 |  |  | 975,906 |  |  | 956,388 |
Originated loans, net of allowance for loan and lease losses | 12,022,277 |  |  | 11,659,364 |  |  | 11,924,424 |  |  | 11,589,149 |
Receivable from the FDIC for loss share agreements (1) | 74,784 |  |  | 37,303 |  |  | 93,397 |  |  | 38,438 |
Income earned not collected | 49,668 |  |  | 49,668 |  |  | 48,390 |  |  | 48,390 |
Federal Home Loan Bank stock | 34,417 |  |  | 34,417 |  |  | 40,819 |  |  | 40,819 |
Preferred stock and other acquired financial assets | 17,783 |  |  | 18,521 |  |  | 33,564 |  |  | 34,786 |
Deposits | 18,763,545 |  |  | 18,785,474 |  |  | 17,874,066 |  |  | 17,898,570 |
Short-term borrowings | 617,794 |  |  | 617,794 |  |  | 511,418 |  |  | 511,418 |
Long-term obligations | 440,300 |  |  | 453,313 |  |  | 510,769 |  |  | 526,037 |
Payable to the FDIC for loss share agreements | 111,339 |  |  | 115,129 |  |  | 109,378 |  |  | 111,941 |
Accrued interest payable | 5,675 |  |  | 5,675 |  |  | 6,737 |  |  | 6,737 |
Interest rate swap | 6,501 |  |  | 6,501 |  |  | 7,220 |  |  | 7,220 |
(1) The fair value of the FDIC receivable excludes amortization expected to be recognized in prospective periods.
Assets And Liabilities Carried At Fair Value On A Recurring Basis | For assets and liabilities carried at fair value on a recurring basis, the following table provides fair value information as of March 31, 2014 and December 31, 2013.
| March 31, 2014
|  |  | Fair value measurements using:
(Dollars in thousands) | Fair value |  | Level 1 inputs |  | Level 2 inputs |  | Level 3 inputs
Assets measured at fair value |  |  |  |  |  |  |
Investment securities available for sale |  |  |  |  |  |  |
U.S. Treasury | $ | 1,273,221 |  |  | $ | — |  |  | $ | 1,273,221 |  |  | $ | — |
Government agency | 1,812,774 |  |  | — |  |  | 1,812,774 |  |  | — |
Mortgage-backed securities | 2,566,666 |  |  | — |  |  | 2,566,666 |  |  | — |
Equity securities | 22,560 |  |  | — |  |  | 22,560 |  |  | — |
Municipal securities | 186 |  |  | — |  |  | 186 |  |  | — |
Other | 830 |  |  | — |  |  | 830 |  |  | — |
Total | $ | 5,676,237 |  |  | $ | — |  |  | $ | 5,676,237 |  |  | $ | — |
Liabilities measured at fair value |  |  |  |  |  |  |
Interest rate swaps accounted for as cash flow hedges | $ | 6,501 |  |  | $ | — |  |  | $ | 6,501 |  |  | $ | — |
| December 31, 2013
|  |  | Fair value measurements using:
| Fair value |  | Level 1 inputs |  | Level 2 inputs |  | Level 3 inputs
Assets measured at fair value |  |  |  |  |  |  |
Investment securities available for sale |  |  |  |  |  |  |
U.S. Treasury | $ | 373,437 |  |  | $ | — |  |  | $ | 373,437 |  |  | $ | — |
Government agency | 2,544,229 |  |  | — |  |  | 2,544,229 |  |  | — |
Mortgage-backed securities | 2,446,873 |  |  | — |  |  | 2,446,873 |  |  | — |
Equity securities | 22,147 |  |  | — |  |  | 22,147 |  |  | — |
Municipal securities | 187 |  |  | — |  |  | 187 |  |  | — |
Other | 830 |  |  | — |  |  | 830 |  |  | — |
Total | $ | 5,387,703 |  |  | $ | — |  |  | $ | 5,387,703 |  |  | $ | — |
Liabilities measured at fair value |  |  |  |  |  |  |
Interest rate swaps accounted for as cash flow hedges | $ | 7,220 |  |  | $ | — |  |  | $ | 7,220 |  |  | $ | — |
Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis | For financial assets and liabilities carried at fair value on a nonrecurring basis, the following table provides fair value information as of March 31, 2014 and December 31, 2013.
| March 31, 2014
|  |  | Fair value measurements using:
(Dollars in thousands) | Fair value |  | Level 1 inputs |  | Level 2 inputs |  | Level 3 inputs
Loans held for sale | $ | 14,911 |  |  | $ | — |  |  | $ | 14,911 |  |  | $ | — |
Originated impaired loans | 73,301 |  |  | — |  |  | — |  |  | 73,301 |
Other real estate not covered under loss share agreements remeasured during current year | 17,678 |  |  | — |  |  | — |  |  | 17,678 |
Other real estate covered under loss share agreements remeasured during current year | 32,402 |  |  | — |  |  | — |  |  | 32,402 |
| December 31, 2013
|  |  | Fair value measurements using:
| Fair value |  | Level 1 inputs |  | Level 2 inputs |  | Level 3 inputs
Loans held for sale | 29,389 |  |  | — |  |  | 29,389 |  |  | — |
Originated impaired loans | 77,817 |  |  | — |  |  | — |  |  | 77,817 |
Other real estate not covered under loss share agreements remeasured during current year | 20,526 |  |  | — |  |  | — |  |  | 20,526 |
Other real estate covered under loss share agreements remeasured during current year | 37,587 |  |  | — |  |  | — |  |  | 37,587 |
Schedule of Fair Value Measurements Of Other Real Estate Opportunities | No financial liabilities were carried at fair value on a nonrecurring basis as of March 31, 2014 and December 31, 2013.

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19296-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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