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Variable Interest Entities (Summary Of VIE Not Consolidated By FHN) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016
--- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |  |  |  |
Loans, net of unearned income |  | $ 19,090,074 | [1] | $ 19,589,520 | [1] | $ 17,574,994
Term borrowings |  | 1,035,036 |  | 1,040,656 |  |
Trading securities |  | 1,167,310 |  | 897,071 |  |
Securities available for sale, Fair Value |  | 3,939,278 | [2] | 3,943,499 | [3] |
Low Income Housing Partnerships [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure |  | 71,114 | [4] | 73,582 | [5] |
Maximum loss exposure, contractual funding commitments |  | 14,700 |  | 17,400 |  |
Liability Recognized |  | 14,749 | [4] | 17,398 | [5] |
Low Income Housing Partnerships [Member] | Other Assets [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum loss exposure, current investments |  | 56,400 |  | 56,200 |  |
Other Tax Credit Investments [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | [6],[7] | 21,210 |  | 21,898 |  |
Liability Recognized | [6],[7] | 0 |  | 0 |  |
Other Tax Credit Investments [Member] | Other Assets [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum loss exposure, current investments |  | 18,000 |  | 18,000 |  |
Small Issuer Trust Preferred Holdings [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | [8] | 332,959 |  | 332,985 |  |
Liability Recognized | [8] | 0 |  | 0 |  |
On Balance Sheet Trust Preferred Securitization [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure |  | 49,361 | [9] | 49,361 | [10] |
Liability Recognized |  | 64,812 | [9] | 64,812 | [10] |
Loans, net of unearned income |  | 112,500 |  | 112,500 |  |
Term borrowings |  | 64,800 |  | 64,800 |  |
Trading securities |  | 1,700 |  | 1,700 |  |
Proprietary & Agency Residential Mortgage Securitizations [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure |  | 2,330 |  | 2,568 |  |
Liability Recognized |  | 0 |  | 0 |  |
Holdings Of Agency Mortgage Backed Securities [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | [8] | 4,289,239 | [11] | 4,163,313 | [12] |
Liability Recognized | [8] | 0 | [11] | 0 | [12] |
Trading securities |  | 500,000 |  | 400,000 |  |
Securities available for sale, Fair Value |  | 3,800,000 |  | 3,800,000 |  |
Commercial Loan Troubled Debt Restructurings [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure |  | 35,295 | [13] | 42,696 | [14] |
Maximum loss exposure, contractual funding commitments |  | 800 |  | 5,200 |  |
Liability Recognized |  | 0 | [13] | 0 | [14] |
Loans, net of unearned income |  | 34,500 |  | 37,500 |  |
Sale Leaseback Transaction [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure |  | 14,827 | [15] | 11,827 | [16] |
Liability Recognized |  | $ 0 | [15] | $ 0 | [16] |
[1] | March 31, 2017 and December 31, 2016 include $30.3 million and $28.5 million, respectively, of held-to-maturity consumer mortgage loans se cured by residential real estate properties in process of foreclosure.
[2] | Includes $ 3 . 5 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
[3] | Includes $ 3.3 billion of securities pledged to secure public deposits, securities sold under agreements to repu rchase, and for other purposes .
[4] | Maximum loss exposure represents $ 56 . 4 million of current investments and $ 14 . 7 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2017 .
[5] | Maximum loss exposure represents $ 56.2 million of current investments and $ 17.4 million of accrued contractual funding commitments. Accrued funding commitments represent unconditional contractual obligations for future funding events, and are also recognized in Other liabilities. FHN currently expects to be required to fund these accrued commitments by the end of 2017 .
[6] | A lia bility is not recognized as investments are written down over the life of the related tax credit
[7] | Maximum loss exposure represe nts current investment balance. Of the initial investment, $ 18 . 0 million was funded through loans from community development enterprises
[8] | Maximum loss exposure represents the value of current investments. A liability is not recognized as FHN is solely a ho lder of the trusts’ securities.
[9] | Includes $ 112 . 5 million classified as Loans, net of unearned income, and $ 1 . 7 million classified as Trading securities which are offset by $ 64.8 million classified as Term borrowings.
[10] | Includes $ 112.5 million classified as Loans, net of unearned income, and $ 1.7 million classified as Trading securities which are offset by $ 64 . 8 million classified as Term borrowings.
[11] | Includes $ .5 b illion classified as Trading securities and $ 3 . 8 billion cla ssified as Securities available-for- sale.
[12] | Includes $ . 4 b illion classified as Tradi ng securities and $ 3 . 8 billion cla ssified as Securities available-for- sale.
[13] | Ma ximum loss exposure represents $ 34.5 million of current receivables and $ .8 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring
[14] | Maximum loss exposure represents $ 37.5 million of current receivables and $ 5.2 million of contractual funding commitments on loans related to commercial borrowers involved in a tro ubled debt restructuring .
[15] | Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor.
[16] | Maximum loss exposure represents the current loan balance plus additional funding commitments less amounts received from the buyer-lessor .

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