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Stock Options, Restricted Stock, and Dividend Reinvestment Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Restricted and Performance Stock Activity | A summary of restricted and performance stock and unit activity during the year ended December 31, 2017, is presented below:
|  | Shares/ Units (a) |  | Weighted average grant date fair value (per share) (b)
Nonvested on January 1, 2017 |  | 4,004,402 |  |  | 11.28 |
Shares/units granted |  | 1,238,754 |  |  | 18.83 |
Shares/units vested |  | (847,107 | ) |  | 11.64 |
Shares/units cancelled |  | (424,833 | ) |  | 10.51 |
Nonvested on December 31, 2017 |  | 3,971,216 |  |  | 12.92 |
(a) | Includes only units that settle in shares and nonvested performance units are included at 100% payout level.
(b) | The weighted average grant date fair value for shares/units granted in 2016 and 2015 was $12.90 and $13.90, respectively.
Schedule of Stock Options | The summary of stock option activity for the year ended December 31, 2017, is shown below:
|  | Options Outstanding |  | Weighted Average Exercise Price (per share) |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (thousands)
January 1, 2017 |  | 5,937,156 |  |  | 17.86 |  |  |  |  |
Options converted from CBF |  | 1,059,685 |  |  | 11.54 |  |  |  |  |
Options granted |  | 423,638 |  |  | 19.73 |  |  |  |  |
Options exercised |  | (475,995 | ) |  | 13.66 |  |  |  |  |
Options expired/cancelled |  | (335,913 | ) |  | 27.21 |  |  |  |  |
December 31, 2017 |  | 6,608,571 |  |  | 16.80 |  |  | 3.18 |  | 34,003 |
Options exercisable |  | 5,016,496 |  |  | 17.65 |  |  | 2.56 |  | 24,646 |
Options expected to vest |  | 1,592,075 |  |  | 14.11 |  |  | 5.13 |  | 9,358 |
Schedule of Valuation Assumptions, Stock Options | FHN used the Black-Scholes Option Pricing Model to estimate the fair value of stock options granted or converted in 2017, 2016, and 2015 with the following assumptions:
|  | 2017 |  | 2016 |  | 2015
Expected dividend yield |  | 1.82% |  | 2.41% |  | 1.68%
Expected weighted-average lives of options granted |  | 6.09 years |  | 6.19 years |  | 6.18 years
Expected weighted-average volatility |  | 26.90% |  | 32.84% |  | 32.26%
Expected volatility range |  | 24.36 - 29.44% |  | 30.73 – 34.95% |  | 23.67 – 40.85%
Risk-free interest rate |  | 2.07% |  | 1.28% |  | 1.68%

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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