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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2015
Fair Value Measurements |
Assets and liabilities measured at fair value on a recurring basis |
|  |  |  | Fair Value Measurements at Reporting Date Using |
|  |  |  | (Dollars in Thousands) |
|  | Assets/Liabilities Measured at Fair Value |  | Quoted Prices in Active Markets for Identical Assets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |
|  | March 31, 2015 |  | (Level 1) |  | (Level 2) |  | (Level 3) |
Measured on a recurring basis: |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |
Available for sale securities |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 4,660,607 |  | $ | — |  | $ | 4,637,185 |  | $ | 23,422 |
States and political subdivisions |  | 277,754 |  | — |  | 277,754 |  | — |
Other |  | 49,819 |  | 29,819 |  | 20,000 |  | — |
|  | $ | 4,988,180 |  | $ | 29,819 |  | $ | 4,934,939 |  | $ | 23,422 |
|  |  |  | Fair Value Measurements at Reporting Date Using |
|  |  |  | (Dollars in Thousands) |
|  | Assets/Liabilities Measured at Fair Value |  | Quoted Prices in Active Markets for Identical Assets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |
|  | December 31, 2014 |  | (Level 1) |  | (Level 2) |  | (Level 3) |
Measured on a recurring basis: |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |
Available for sale securities |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 4,600,372 |  | $ | — |  | $ | 4,576,309 |  | $ | 24,063 |
States and political subdivisions |  | 282,276 |  | — |  | 282,276 |  | — |
Other |  | 49,315 |  | 29,315 |  | 20,000 |  | — |
|  | $ | 4,931,963 |  | $ | 29,315 |  | $ | 4,878,585 |  | $ | 24,063 |
Reconciliation of activity for mortgage-backed securities on a net basis | The following table presents a reconciliation of activity for such mortgage-backed securities on a net basis (Dollars in Thousands):
Balance at December 31, 2014 |  | $ | 24,063 |
Principal paydowns |  | (763 | )
Total unrealized losses included in: |  |  |
Other comprehensive income |  | 349 |
Impairment realized |  | (227 | )
Balance at March 31, 2015 |  | $ | 23,422 |
Assets measured at fair value on a non-recurring basis |
|  |  |  | Fair Value Measurements at Reporting Date Using |
|  |  |  | (Dollars in Thousands) |
|  | Assets/Liabilities Measured at Fair Value |  | Quoted Prices in Active Markets for Identical Assets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |  | Net Provision (Credit) During |
|  | March 31, 2015 |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Period |
Measured on a non-recurring basis: |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Impaired loans |  | $ | 28,630 |  | $ | — |  | $ | — |  | $ | 28,630 |  | $ | 1,503 |
Other real estate owned |  | 155 |  | — |  | — |  | 155 |  | 17 |
|  |  |  | Fair Value Measurements at Reporting Date Using |
|  |  |  | (Dollars in Thousands) |
|  | Assets/Liabilities Measured at Fair Value |  | Quoted Prices in Active Markets for Identical |  | Significant Other Observable |  | Significant Unobservable |  | Net (Credit) Provision |
|  | December 31, 2014 |  | Assets (Level 1) |  | Inputs (Level 2) |  | Inputs (Level 3) |  | During the Period |
Measured on a non-recurring basis: |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Impaired loans |  | $ | 29,501 |  | $ | — |  | $ | — |  | $ | 29,501 |  | $ | (1,557 | )
Other real estate owned |  | 6,112 |  | — |  | — |  | 6,112 |  | 597 |

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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=36462937&loc=d3e19296-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 + 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=36462937&loc=d3e19190-110258 + Details
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