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Derivatives (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivatives Associated With Fixed Income Trading Activities | The following tables summarize FHN’s derivatives associated with fixed income trading activities as of December 31, 2018 and 2017:
|  | December 31, 2018
(Dollars in thousands) |  | Notional |  | Assets |  | Liabilities
Customer Interest Rate Contracts |  | $ | 2,271,448 |  |  | $ | 18,744 |  |  | $ | 27,768 |
Offsetting Upstream Interest Rate Contracts |  | 2,271,448 |  |  | 4,014 |  |  | 9,041 |
Option Contracts Purchased |  | 20,000 |  |  | 25 |  |  | — |
Forwards and Futures Purchased |  | 4,684,177 |  |  | 28,304 |  |  | 181 |
Forwards and Futures Sold |  | 4,967,454 |  |  | 522 |  |  | 30,055 |
|  | December 31, 2017
(Dollars in thousands) |  | Notional |  | Assets |  | Liabilities
Customer Interest Rate Contracts |  | $ | 2,026,753 |  |  | $ | 22,097 |  |  | $ | 18,323 |
Offsetting Upstream Interest Rate Contracts |  | 2,026,753 |  |  | 17,931 |  |  | 20,720 |
Option Contracts Purchased |  | 20,000 |  |  | 15 |  |  | — |
Forwards and Futures Purchased |  | 6,257,140 |  |  | 4,354 |  |  | 5,526 |
Forwards and Futures Sold |  | 6,292,012 |  |  | 5,806 |  |  | 4,010 |
Derivatives Associated With Interest Rate Risk Management Activities | The following tables summarize FHN’s derivatives associated with interest rate risk management activities as of December 31, 2018 and 2017:
|  | December 31, 2018 |
(Dollars in thousands) |  | Notional |  | Assets |  | Liabilities |
Customer Interest Rate Contracts Hedging |  |  |  |  |  |  |
Hedging Instruments and Hedged Items: |  |  |  |  |  |  |
Customer Interest Rate Contracts |  | $ | 2,029,162 |  |  | $ | 20,262 |  |  | $ | 25,880 |  |
Offsetting Upstream Interest Rate Contracts |  | 2,029,162 |  |  | 8,154 |  |  | 9,153 |  |
Debt Hedging |  |  |  |  |  |  |
Hedging Instruments: |  |  |  |  |  |  |
Interest Rate Swaps |  | $ | 900,000 |  |  | $ | 127 |  |  | $ | 6 |  |
Hedged Items: |  |  |  |  |  |  |
Term Borrowings: |  |  |  |  |  |  |
Par |  | N/A |  |  | N/A |  |  | $ | 900,000 |  |
Cumulative fair value hedging adjustments |  | N/A |  |  | N/A |  |  | (15,094 | ) |
Unamortized premium/(discount) and issuance costs |  | N/A |  |  | N/A |  |  | (2,295 | ) |
Total carrying value |  | N/A |  |  | N/A |  |  | $ | 882,611 |  |
|  | December 31, 2017 |
(Dollars in thousands) |  | Notional |  | Assets |  | Liabilities |
Customer Interest Rate Contracts Hedging |  |  |  |  |  |  |
Hedging Instruments and Hedged Items: |  |  |  |  |  |  |
Customer Interest Rate Contracts |  | $ | 1,608,912 |  |  | $ | 11,644 |  |  | $ | 19,780 |  |
Offsetting Upstream Interest Rate Contracts |  | 1,608,912 |  |  | 18,473 |  |  | 11,019 |  |
Debt Hedging |  |  |  |  |  |  |
Hedging Instruments: |  |  |  |  |  |  |
Interest Rate Swaps |  | $ | 900,000 |  |  | $ | 371 |  |  | N/A |  |
Hedged Items: |  |  |  |  |  |  |
Term Borrowings: |  |  |  |  |  |  |
Par |  | N/A |  |  | N/A |  |  | $ | 900,000 |  |
Cumulative fair value hedging adjustments |  | N/A |  |  | N/A |  |  | (13,472 | ) |
Unamortized premium/(discount) and issuance costs |  | N/A |  |  | N/A |  |  | (3,910 | ) |
Total carrying value |  | N/A |  |  | N/A |  |  | $ | 882,618 |  |
Gains/(Losses) on Derivatives Associated with Interest Rate Risk Management Activities | The following table summarizes gains/(losses) on FHN’s derivatives associated with interest rate risk management activities for the years ended December 31, 2018, 2017, and 2016:
|  | Year Ended December 31
|  | 2018 |  | 2017 |  | 2016
(Dollars in thousands) |  | Gains/(Losses) |  | Gains/(Losses) |  | Gains/(Losses)
Customer Interest Rate Contracts Hedging |  |  |  |
Hedging Instruments and Hedged Items: |  |  |  |  |  |
Customer Interest Rate Contracts (a) |  | $ | 1,779 |  |  | $ | (10,703 | ) |  | (22,969 | )
Offsetting Upstream Interest Rate Contracts (a) |  | (1,779 | ) |  | 10,699 |  |  | 22,969 |
Debt Hedging |  |  |  |  |  |
Hedging Instruments: |  |  |  |  |  |
Interest Rate Swaps (b) |  | $ | (1,648 | ) |  | $ | (7,766 | ) |  | $ | (3,552 | )
Hedged Items: |  |  |  |  |  |
Term Borrowings (a) (c) |  | 1,622 |  |  | 7,582 |  |  | 3,429 |
(a) | Gains/losses included in All other expense within the Consolidated Statements of Income.
(b) | Gains/losses included in the Interest expense for 2018, and All other expense for 2017 and 2016 within the Consolidated Statement of Income.
(c) | Represents gains and losses attributable to changes in fair value due to interest rate risk as designated in ASC 815-20 hedging relationships.
Derivative Associated With Cash Flow Hedges | The following tables summarize FHN’s derivative activities associated with cash flow hedges as of December 31, 2018 and 2017:
|  | December 31, 2018
(Dollars in thousands) |  | Notional |  | Assets |  | Liabilities
Cash Flow Hedges |  |  |  |  |  |
Hedging Instruments: |  |  |  |  |  |
Interest Rate Swaps |  | $ | 900,000 |  |  | $ | 888 |  |  | $ | 5 |
Hedged Items: |  |  |  |  |  |
Variability in Cash Flows Related to Debt Instruments (Primarily Loans) |  | N/A |  |  | $ | 900,000 |  |  | N/A |
|  | December 31, 2017
(Dollars in thousands) |  | Notional |  | Assets |  | Liabilities
Cash Flow Hedges |  |  |  |  |  |
Hedging Instruments: |  |  |  |  |  |
Interest Rate Swaps |  | $ | 900,000 |  |  | $ | 942 |  |  | N/A
Hedged Items: |  |  |  |  |  |
Variability in Cash Flows Related to Debt Instruments (Primarily Loans) |  | N/A |  |  | $ | 900,000 |  |  | N/A
Gains/(Losses) on Derivatives Associated with Cash Flow Hedges | The following table summarizes gains/(losses) on FHN’s derivatives associated with cash flow hedges for the years ended December 31, 2018 and 2017:
|  | Year Ended December 31
|  | 2018 |  | 2017 |  | 2016
(Dollars in thousands) |  | Gains/(Losses) |  | Gains/(Losses) |  | Gains/(Losses)
Cash Flow Hedges |  |  |  |
Hedging Instruments: |  |  |  |  |  |
Interest Rate Swaps (a) |  | $ | (5,502 | ) |  | $ | (8,264 | ) |  | $ | (2,045 | )
Gain/(loss) recognized in Other comprehensive income/(loss) |  | (6,284 | ) |  | (2,156 | ) |  | 130 |
Gain/(loss) reclassified from AOCI into Interest income |  | 2,142 |  |  | (2,945 | ) |  | (1,395 | )
(a) | Approximately $7.4 million of cumulative losses are expected to be reclassified into earnings in the next twelve months.
Derivative Assets And Collateral Received | The following table provides details of derivative assets and collateral received as presented on the Consolidated Statements of Condition as of December 31, 2018 and 2017:
|  |  |  |  |  |  |  | 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 (a) |  | Derivative liabilities available for offset |  | Collateral Received |  | Net amount
Derivative assets: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 (b) |  | $ | 52,562 |  |  | $ | — |  |  | $ | 52,562 |  |  | $ | (12,745 | ) |  | $ | (39,637 | ) |  | $ | 180 |
December 31, 2017 (b) |  | 71,458 |  |  | — |  |  | 71,458 |  |  | (17,278 | ) |  | (51,271 | ) |  | 2,909 |
(a) | Included in Derivative assets on the Consolidated Statements of Condition. As of December 31, 2018 and 2017, $28.9 million and $10.2 million, respectively, of derivative assets (primarily fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements.
(b) | Amounts are comprised entirely of interest rate derivative contracts.
Derivative Liabilities and Collateral Pledged | The following table provides details of derivative liabilities and collateral pledged as presented on the Consolidated Statements of Condition as of December 31, 2018 and 2017:
|  |  |  |  |  |  |  | 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 (a) |  | Derivative assets available for offset |  | Collateral pledged |  | Net amount
Derivative liabilities: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 (b) |  | $ | 71,853 |  |  | $ | — |  |  | $ | 71,853 |  |  | $ | (12,745 | ) |  | $ | (54,773 | ) |  | $ | 4,335 |
December 31, 2017 (b) |  | 69,842 |  |  | — |  |  | 69,842 |  |  | (17,278 | ) |  | (51,801 | ) |  | 763 |
(a) | Included in Derivative liabilities on the Consolidated Statements of Condition. As of December 31, 2018 and 2017, $61.9 million and $15.2 million, respectively, of derivative liabilities (primarily Visa-related derivatives and fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements.
(b) | Amounts are comprised entirely of interest rate derivative contracts.

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