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Stock Options and Restricted Shares - Restricted Shares Awarded (Details) | 9 Months Ended
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Sep. 30, 2018 shares
2018 Restricted granted shares | Named Executive Officers (NEOs) | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 96,878 | [1]
2018 Restricted granted shares | Named Executive Officers (NEOs) | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 145,339 | [1]
2018 Restricted granted shares | Leadership team |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 25,990 |
2017 Restricted granted shares | Named Executive Officers (NEOs) | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 72,537 | [1]
2017 Restricted granted shares | Named Executive Officers (NEOs) | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 109,339 | [1]
2017 Restricted granted shares | Leadership team |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 24,916 |
Time Based Awards | Associates |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 127,789 | [2],[3]
Restrictions Lapsed and shares released to participants | 224 | [2],[3]
Shares Forfeited by participants | 2,783 | [2],[3],[4]
Shares Unvested | 124,782 | [2],[3]
Time Based Awards | Associates | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting Period in years | 3 years | [2],[3]
Time Based Awards | Associates | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting Period in years | 5 years | [2],[3]
Time Based Awards | BNC Bancorp | Associates |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares awarded | 16,777 | [2],[5]
Restrictions Lapsed and shares released to participants | 0 | [2],[5]
Shares Forfeited by participants | 500 | [2],[3],[4],[5]
Shares Unvested | 16,277 | [2],[5]
Time Based Awards | BNC Bancorp | Associates | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting Period in years | 3 years | [2],[5]
Time Based Awards | BNC Bancorp | Associates | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting Period in years | 5 years | [2],[5]
Performance Based Awards | Leadership team |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting Period in years | 3 years | [2],[6]
Shares awarded | 6,200 | [2],[6]
Restrictions Lapsed and shares released to participants | 4,340 | [2],[6]
Shares Forfeited by participants | 1,860 | [2],[4],[6]
Shares Unvested | 0 | [2],[6]
Outside Director Awards | Outside directors |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting Period in years | 1 year | [2],[7]
Shares awarded | 16,072 | [2],[7]
Restrictions Lapsed and shares released to participants | 1,148 | [2],[7]
Shares Forfeited by participants | 0 | [2],[4],[7]
Shares Unvested | 14,924 | [2],[7]
[1] | The named executive officers are awarded a range of awards that may be earned based on attainment of goals between a target level of performance and a maximum level of performance.
[2] | Groups include employees (referred to as associates above), the leadership team which includes our named executive officers and other key senior leadership members, and outside directors. When the restricted shares are awarded, a participant receives voting rights and forfeitable dividend rights with respect to the shares, but is not able to transfer the shares until the restrictions have lapsed. Once the restrictions lapse, the participant is taxed on the value of the award and may elect to sell some shares (or have Pinnacle Financial withhold some shares) to pay the applicable income taxes associated with the award. Alternatively, the recipient can pay the withholding taxes in cash. For time-based vesting restricted share awards, dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination. For performance-based vesting awards and time-based vesting awards to Pinnacle Financial's executive officers, dividends are placed into escrow until the forfeiture restrictions on such shares lapse.
[3] | The forfeiture restrictions on these restricted share awards lapse in equal annual installments on the anniversary date of the grant.
[4] | These shares represent forfeitures resulting from recipients whose employment or board membership is terminated during the year-to-date period ended September 30, 2018 or for which the performance criteria applicable to the award are not achieved. Any dividends paid on shares for which the forfeiture restrictions do not lapse will be recouped by Pinnacle Financial at the time of termination or will not be distributed from escrow, as applicable.
[5] | Restricted share awards issued to associates that were former associates of BNC pursuant to legacy BNC incentive plans assumed by Pinnacle Financial.
[6] | Reflects conversion of restricted share units issued in prior years to restricted share awards. The forfeiture restrictions on these restricted share awards lapse in separate equal installments should Pinnacle Financial achieve certain soundness targets over each year of the subsequent vesting period. See further details of these awards under the caption "Restricted Share Units" below.
[7] | Restricted share awards are issued to the outside members of the board of directors in accordance with their board compensation plan. Restrictions lapse on February 28, 2019 based on each individual board member meeting their attendance goals for the various board and board committee meetings to which each member was scheduled to attend.

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- Definition Vesting period of for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of restrictions lapsed and shares released to associates and directors made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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