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Master Netting And Similar Agreements (Tables) | 12 Months Ended
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Dec. 31, 2017
Offsetting [Abstract] |
Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties | The following table provides details of Securities purchased under agreements to resell as presented on the Consolidated Statements of Condition and collateral pledged by counterparties as of December 31:
|  |  |  |  |  |  |  | Gross amounts not offset in the Statements of Condition |  |
(Dollars in thousands) |  | Gross amounts of recognized assets |  | Gross amounts offset in the Statements of Condition |  | Net amounts of assets presented in the Statements of Condition |  | Offsetting securities sold under agreements to repurchase |  | Securities collateral (not recognized on FHN’s Statements of Condition) |  | Net amount
Securities purchased under agreements to resell: |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 725,609 |  |  | $ | — |  |  | $ | 725,609 |  |  | $ | (259 | ) |  | $ | (720,036 | ) |  | $ | 5,314 |
2016 |  | 613,682 |  |  | — |  |  | 613,682 |  |  | (1,628 | ) |  | (603,813 | ) |  | 8,241 |
Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company | The following table provides details of Securities sold under agreements to repurchase as presented on the Consolidated Statements of Condition and collateral pledged by FHN as of December 31:
|  |  |  |  |  |  |  | Gross amounts not offset in the Statements of Condition |  |
(Dollars in thousands) |  | Gross amounts of recognized liabilities |  | Gross amounts offset in the Statements of Condition |  | Net amounts of liabilities presented in the Statements of Condition |  | Offsetting securities purchased under agreements to resell |  | Securities/ government guaranteed loans collateral |  | Net amount
Securities sold under agreements to repurchase: |  |  |  |  |  |  |  |  |  |  |  |
2017 |  | $ | 656,602 |  |  | $ | — |  |  | $ | 656,602 |  |  | $ | (259 | ) |  | $ | (656,216 | ) |  | $ | 127 |
2016 |  | 453,053 |  |  | — |  |  | 453,053 |  |  | (1,628 | ) |  | (451,414 | ) |  | 11 |
Schedule of the Remaining Contractual Maturity by Collateral Type of Securities Sold Under Agreements To Repurchase | The following tables provide details, by collateral type, of the remaining contractual maturity of Securities sold under agreements to repurchase as of December 31:
|  | December 31, 2017
(Dollars in thousands) |  | Overnight and Continuous |  | Up to 30 Days |  | Total
Securities sold under agreements to repurchase: |  |  |  |  |  |
U.S. treasuries |  | $ | 13,830 |  |  | $ | — |  |  | $ | 13,830 |
Government agency issued MBS |  | 424,821 |  |  | 5,365 |  |  | 430,186 |
Government agency issued CMO |  | 54,037 |  |  | 3,666 |  |  | 57,703 |
Government guaranteed loans (SBA and USDA) |  | 154,883 |  |  | — |  |  | 154,883 |
Total Securities sold under agreements to repurchase |  | $ | 647,571 |  |  | $ | 9,031 |  |  | $ | 656,602 |
|  | December 31, 2016
(Dollars in thousands) |  | Overnight and Continuous |  | Up to 30 Days |  | Total
Securities sold under agreements to repurchase: |  |  |  |  |  |
U.S. treasuries |  | $ | 14,864 |  |  | $ | — |  |  | $ | 14,864 |
Government agency issued MBS |  | 421,771 |  |  | — |  |  | 421,771 |
Government agency issued CMO |  | — |  |  | 16,418 |  |  | 16,418 |
Total Securities sold under agreements to repurchase |  | $ | 436,635 |  |  | $ | 16,418 |  |  | $ | 453,053 |

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- Definition Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties [Table Text Block] + References No definition available. + Details
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- Definition Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company [Table Text Block] + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of the nature and risks of short-term collateralized financing obtained through repurchase agreements, securities lending transactions and repurchase-to-maturity transactions, accounted for as secured borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL34722452-111729 + Details
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