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Intangible Assets (Schedule Of Estimated Aggregate Amortization Expense for Intangible Assets) (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Goodwill and Intangible Assets Disclosure [Abstract] |
2018 | $ 26,174
2019 | 25,108
2020 | 21,422
2021 | 19,787
2022 | $ 17,631

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- Definition Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, including financial assets, excluding goodwill, with a finite life. + References No definition available. + Details
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X
- Definition Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, including financial assets, excluding goodwill, with a finite life. + References No definition available. + Details
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X
- Definition Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, including financial assets, excluding goodwill, with a finite life. + References No definition available. + Details
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X
- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, including financial assets, excluding goodwill, with a finite life. + References No definition available. + Details
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Namespace Prefix: | fhn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, including financial assets, excluding goodwill, with a finite life. + References No definition available. + Details
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Namespace Prefix: | fhn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
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