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Variable Interest Entities (Summary Of VIE Not Consolidated By FHN) (Details) (USD $) | Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2012
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Variable Interest Entity [Line Items] |  |  |  |  |  |
Loans, net of unearned income | $ 15,119,461,000 |  | $ 15,389,074,000 | $ 15,889,670,000 |  |
Term borrowings | 1,507,048,000 |  | 1,739,859,000 | 2,197,864,000 |  |
Trading securities | 1,194,749,000 |  | 801,718,000 | 1,397,746,000 |  |
Total MSR recognized by FHN | 4,687,000 |  | 72,793,000 | 109,102,000 |  | 114,311,000
Custodial balances | 4,534,245,000 |  | 4,637,839,000 | 4,454,045,000 |  |
Securities available-for-sale | 3,571,179,000 | [1] | 3,398,457,000 | 3,190,219,000 | [2] |
Low Income Housing Partnerships [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 48,067,000 | [3],[4] |  | 52,528,000 | [3],[5] |
Maximum loss exposure, contractual funding commitments | 6,300,000 |  |  | 1,900,000 |  |
Liability Recognized | 0 | [3],[4] |  | 0 | [3],[5] |
Low Income Housing Partnerships [Member] | Other Assets Member |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum loss exposure, current investments | 41,700,000 |  |  | 50,600,000 |  |
New Market Tax Credit Llcs [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 22,492,000 | [3],[6] |  | 23,494,000 | [3],[7] |
Liability Recognized | 0 | [3],[6] |  | 0 | [3],[7] |
New Market Tax Credit Llcs [Member] | Current Investment Funded By Borrowings [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum loss exposure, current investments | 18,000,000 |  |  | 18,000,000 |  |
Small Issuer Trust Preferred Holdings [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 375,247,000 | [8] |  | 418,404,000 | [8] |
Liability Recognized | 0 | [8] |  | 0 | [8] |
On Balance Sheet Trust Preferred Securitization [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 53,463,000 | [9] |  | 54,577,000 | [10] |
Liability Recognized | 60,711,000 | [9] |  | 59,597,000 | [10] |
Loans, net of unearned income | 112,500,000 |  |  | 112,500,000 |  |
Term borrowings | 60,700,000 |  |  | 59,600,000 |  |
Trading securities | 1,700,000 |  |  | 1,700,000 |  |
Proprietary Trust Preferred Issuances [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Liability Recognized | 206,186,000 | [11] |  | 206,186,000 | [11] |
Proprietary Agency Residential Mortgage Securitizations [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 54,559,000 | [12] |  | 416,648,000 | [13] |
Liability Recognized | 0 | [12] |  | 0 | [13] |
Proprietary Agency Residential Mortgage Securitizations [Member] | Other Assets Member |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Aggregate servicing advances | 45,500,000 |  |  | 304,800,000 |  |
On Balance Sheet Consumer Loan Securitizations [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure |  |  |  | 14,477,000 | [14] |
Liability Recognized |  |  |  | 270,385,000 | [14] |
Loans, net of unearned income |  |  |  | 284,900,000 |  |
Term borrowings |  |  |  | 270,400,000 |  |
Holdings Of Agency Mortgage Backed Securities [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 3,861,630,000 | [15],[8] |  | 3,584,187,000 | [16],[8] |
Liability Recognized | 0 | [15],[8] |  | 0 | [16],[8] |
Trading securities | 537,300,000 |  |  | 669,300,000 |  |
Securities available-for-sale | 3,300,000,000 |  |  | 2,900,000,000 |  |
Short Positions In Agency Mortgage Backed Securities [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Liability Recognized | 1,586,000 | [11] |  | 51,108,000 | [11] |
Commercial Loan Troubled Debt Restructurings [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 58,736,000 | [17],[18] |  | 68,921,000 | [17],[19] |
Maximum loss exposure, contractual funding commitments | 1,500,000 |  |  | 3,200,000 |  |
Liability Recognized | 0 | [17],[18] |  | 0 | [17],[19] |
Loans, net of unearned income | 57,200,000 |  |  | 65,700,000 |  |
Managed Discretionary Trusts [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Maximum Loss Exposure | 0 | [11] |  | 0 | [11] |
Liability Recognized | 0 | [11] |  | 0 | [11] |
Proprietary Residential Mortgage Securitizations [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Trading securities | 6,600,000 |  |  | 7,600,000 |  |
Total MSR recognized by FHN | 1,400,000 |  |  | 66,600,000 |  |
Agency Residential Mortgage Securitizations [Member] |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Trading securities |  |  |  | 8,800,000 |  |
Total MSR recognized by FHN | $ 1,000,000 |  |  | $ 28,700,000 |  |
[1] | Includes $3.3 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
[2] | Includes $2.9 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
[3] | A liability is not recognized as investments are written down over the life of the related tax credit.
[4] | Maximum loss exposure represents $41.7 million of current investments and $6.3 million of contractual funding commitments. Only the current investment amount is included in Other assets.
[5] | Maximum loss exposure represents $50.6 million of current investments and $1.9 million of contractual funding commitments. Only the current investment amount is included in Other assets.
[6] | Maximum loss exposure represents current investment balance. Of the initial investment, $18.0 million was funded through loans from community development enterprises.
[7] | Maximum loss exposure represents 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 holder 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 $60.7 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 $59.6 million classified as Term borrowings.
[11] | No exposure to loss due to the nature of FHN’s involvement.
[12] | Includes $1.4 million and $1.0 million classified as MSR related to proprietary and agency residential mortgage securitizations, respectively, and $6.6 million classified as Trading securities related to proprietary residential mortgage securitizations. Aggregate servicing advances of $45.5 million are classified as Other assets.
[13] | Includes $66.6 million and $28.7 million classified as MSR and $7.6 million and $8.8 million classified as Trading securities related to proprietary and agency residential mortgage securitizations, respectively. Aggregate servicing advances of $304.8 million are classified as Other assets.
[14] | Includes $284.9 million classified as Loans, net of unearned income which are offset by $270.4 million classified as Term borrowings.
[15] | Includes $537.3 million classified as Trading securities and $3.3 billion classified as Securities available-for-sale.
[16] | Includes $669.3 million classified as Trading securities and $2.9 billion classified as Securities available-for-sale.
[17] | A liability is not recognized as the loans are the only variable interests held in the troubled commercial borrowers’ operations.
[18] | Maximum loss exposure represents $57.2 million of current receivables and $1.5 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring.
[19] | Maximum loss exposure represents $65.7 million of current receivables and $3.2 million of contractual funding commitments on loans related to commercial borrowers involved in a troubled debt restructuring.

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