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Variable Interest Entities - Summary of VIE Consolidated By FHN (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | --- | --- | ---
Assets: |  |  |  |  |  |  |  |
Cash and due from banks | $ 642,051 |  |  | $ 639,073 |  |  |  |
Loans, net of unearned income | 27,350,214 | [1] |  | 27,658,929 | [1] | $ 20,166,091 |  |
Less: Allowance for loan losses | 185,959 |  | $ 185,462 | 189,555 |  | $ 194,867 | $ 197,257 | $ 202,068
Total net loans | 27,164,255 |  |  | 27,469,374 |  |  |  |
Other assets | 1,883,077 |  |  | 1,723,189 |  |  |  |
Total assets | 40,635,924 |  |  | 41,423,388 |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Term borrowings | 1,200,134 |  |  | 1,218,097 |  |  |  |
Other liabilities | 552,921 |  |  | 549,234 |  |  |  |
Total liabilities | 35,893,993 |  |  | 36,842,900 |  |  |  |
On-Balance Sheet Consumer Loan Securitization |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Cash and due from banks | 0 |  |  | 0 |  |  |  |
Loans, net of unearned income | 17,106 |  |  | 24,175 |  |  |  |
Less: Allowance for loan losses | 0 |  |  | 0 |  |  |  |
Total net loans | 17,106 |  |  | 24,175 |  |  |  |
Other assets | 35 |  |  | 47 |  |  |  |
Total assets | 17,141 |  |  | 24,222 |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Term borrowings | 4,071 |  |  | 11,226 |  |  |  |
Other liabilities | 0 |  |  | 2 |  |  |  |
Total liabilities | 4,071 |  |  | 11,228 |  |  |  |
Rabbi Trusts Used for Deferred Compensation Plans |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Other assets | 84,170 |  |  | 80,479 |  |  |  |
Total assets | 84,170 |  |  | 80,479 |  |  |  |
Liabilities: |  |  |  |  |  |  |  |
Other liabilities | 63,017 |  |  | 61,733 |  |  |  |
Total liabilities | $ 63,017 |  |  | $ 61,733 |  |  |  |
[1] | September 30, 2018 and December 31, 2017 include $20.8 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

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