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Master Netting and Similar Agreements - Repurchase, Reverse Repurchase, and Securities Borrowing Transactions (Tables) | 12 Months Ended
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Dec. 31, 2018
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: |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 386,443 |  |  | $ | — |  |  | $ | 386,443 |  |  | $ | (261 | ) |  | $ | (382,756 | ) |  | $ | 3,426 |
2017 |  | 725,609 |  |  | — |  |  | 725,609 |  |  | (259 | ) |  | (720,036 | ) |  | 5,314 |
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: |  |  |  |  |  |  |  |  |  |  |  |
2018 |  | $ | 762,592 |  |  | $ | — |  |  | $ | 762,592 |  |  | $ | (261 | ) |  | $ | (762,322 | ) |  | $ | 9 |
2017 |  | 656,602 |  |  | — |  |  | 656,602 |  |  | (259 | ) |  | (656,216 | ) |  | 127 |
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, 2018
(Dollars in thousands) | Overnight and Continuous |  | Up to 30 Days |  | Total
Securities sold under agreements to repurchase: |  |  |  |  |
U.S. treasuries | $ | 16,321 |  |  | $ | — |  |  | $ | 16,321 |
Government agency issued MBS | 414,488 |  |  | 5,220 |  |  | 419,708 |
Government agency issued CMO | 36,688 |  |  | — |  |  | 36,688 |
Government guaranteed loans (SBA and USDA) | 289,875 |  |  | — |  |  | 289,875 |
Total Securities sold under agreements to repurchase | $ | 757,372 |  |  | $ | 5,220 |  |  | $ | 762,592 |
| 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 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729 + Details
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