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Employee Benefit and Deferred Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Information relating to the defined benefit pension plan and post-retirement health and life plans | Information relating to the legacy Renasant defined benefit pension plan (“Pension Benefits - Renasant”), the assumed HeritageBank defined benefit pension plan (“Pension Benefits - HeritageBank”) and post-retirement health and life plan (“Other Benefits”) as of December 31, 2016 and 2015 is as follows:
| Pension Benefits Renasant |  | Pension Benefits HeritageBank |  | Other Benefits
| 2016 |  | 2015 |  | 2016 |  | 2015 |  | 2016 |  | 2015
Change in benefit obligation |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year | $ | 27,856 |  |  | $ | 28,087 |  |  | $ | 12,913 |  |  | $ | — |  |  | $ | 1,704 |  |  | $ | 1,941 |
Service cost | — |  |  | — |  |  | — |  |  | — |  |  | 12 |  |  | 17 |
Interest cost | 1,216 |  |  | 1,095 |  |  | 172 |  |  | 305 |  |  | 58 |  |  | 60 |
Plan participants’ contributions | — |  |  | — |  |  | — |  |  | — |  |  | 76 |  |  | 82 |
Actuarial loss (gain) | (115 | ) |  | 605 |  |  | (481 | ) |  | (685 | ) |  | (56 | ) |  | (37 | )
Benefits paid | (2,018 | ) |  | (1,931 | ) |  | (22 | ) |  | (15 | ) |  | (228 | ) |  | (359 | )
Settlements(1) | — |  |  | — |  |  | (11,509 | ) |  | (2,187 | ) |  | — |  |  | — |
Transfer from HeritageBank Pension Plan | 1,073 |  |  | — |  |  | (1,073 | ) |  | — |  |  | — |  |  | — |
Addition from business combination | — |  |  | — |  |  | — |  |  | 15,495 |  |  | — |  |  | — |
Benefit obligation at end of year | $ | 28,012 |  |  | $ | 27,856 |  |  | $ | — |  |  | $ | 12,913 |  |  | $ | 1,566 |  |  | $ | 1,704 |
Change in fair value of plan assets |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year | $ | 24,434 |  |  | $ | 26,532 |  |  | $ | 12,458 |  |  | $ | — |  |  |  |  |
Actual return on plan assets | 1,752 |  |  | (167 | ) |  | 29 |  |  | (21 | ) |  |  |  |
Contribution by employer | — |  |  | — |  |  | 142 |  |  | — |  |  |  |  |
Benefits paid | (2,018 | ) |  | (1,931 | ) |  | (22 | ) |  | (15 | ) |  |  |  |
Settlements | — |  |  | — |  |  | (11,509 | ) |  | (2,187 | ) |  |  |  |
Expenses paid from plan trust | — |  |  | — |  |  | (25 | ) |  | — |  |  |  |  |
Transfer from HeritageBank Pension Plan | 1,073 |  |  | — |  |  | (1,073 | ) |  | — |  |  |  |  |
Addition from business combination | — |  |  | — |  |  | — |  |  | 14,681 |  |  |  |  |
Fair value of plan assets at end of year | $ | 25,241 |  |  | $ | 24,434 |  |  | $ | — |  |  | $ | 12,458 |  |  |  |  |
Funded status at end of year | $ | (2,771 | ) |  | $ | (3,422 | ) |  | $ | — |  |  | $ | (455 | ) |  | $ | (1,566 | ) |  | $ | (1,704 | )
Weighted-average assumptions as of December 31 |  |  |  |  |  |  |  |  |  |  |
Discount rate used to determine the benefit obligation | 4.35 | % |  | 4.56 | % |  | — | % |  | 4.27 | % |  | 3.57 | % |  | 3.63 | %
(1) | Settlements from the HeritageBank defined benefit pension plan represent the lump sum payments made to participants upon final distribution of benefits as a result of the plan's termination.
Plan expense for noncontributory benefit pension plan and post-retirement health and life plans | The components of net periodic benefit cost and other amounts recognized in other comprehensive income for the defined benefit pension and post-retirement health and life plans for the year ended December 31, 2016, 2015 and 2014 are as follows:
| Pension Benefits Renasant |  | Pension Benefits HeritageBank(1) |  | Other Benefits
| 2016 |  | 2015 |  | 2014 |  | 2016 |  | 2015 |  | 2016 |  | 2015 |  | 2014
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 12 |  |  | $ | 17 |  |  | $ | 14 |
Interest cost | 1,216 |  |  | 1,095 |  |  | 1,292 |  |  | 172 |  |  | 305 |  |  | 58 |  |  | 60 |  |  | 84 |
Expected return on plan assets | (1,872 | ) |  | (2,040 | ) |  | (2,160 | ) |  | (113 | ) |  | (216 | ) |  | — |  |  | — |  |  | — |
Prior service cost recognized | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Recognized actuarial loss | 404 |  |  | 331 |  |  | 207 |  |  | — |  |  | — |  |  | 76 |  |  | 101 |  |  | 89 |
Settlement/curtailment/termination losses | — |  |  | — |  |  | 453 |  |  | (780 | ) |  | (65 | ) |  | — |  |  | — |  |  | — |
Net periodic benefit cost | (252 | ) |  | (614 | ) |  | (208 | ) |  | (721 | ) |  | 24 |  |  | 146 |  |  | 178 |  |  | 187 |
Net actuarial loss/(gain) arising during the period | 5 |  |  | 2,812 |  |  | 3,047 |  |  | (397 | ) |  | (448 | ) |  | (56 | ) |  | (37 | ) |  | (118 | )
Net Settlement/curtailment/termination losses | — |  |  | — |  |  | (453 | ) |  | 780 |  |  | 65 |  |  |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | (404 | ) |  | (331 | ) |  | (207 | ) |  | — |  |  | — |  |  | (76 | ) |  | (101 | ) |  | (89 | )
Total recognized in other comprehensive income | (399 | ) |  | 2,481 |  |  | 2,387 |  |  | 383 |  |  | (383 | ) |  | (132 | ) |  | (138 | ) |  | (207 | )
Total recognized in net periodic benefit cost and other comprehensive income | $ | (651 | ) |  | $ | 1,867 |  |  | $ | 2,179 |  |  | $ | (338 | ) |  | $ | (359 | ) |  | $ | 14 |  |  | $ | 40 |  |  | $ | (20 | )
Weighted-average assumptions as of December 31 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate used to determine net periodic pension cost | 4.56 | % |  | 4.00 | % |  | 4.83 | % |  | 4.27 | % |  | 4.00 | % |  | 3.63 | % |  | 3.22 | % |  | 4.66 | %
Expected return on plan assets | 8.00 | % |  | 8.00 | % |  | 8.00 | % |  | 3.00 | % |  | 3.00 | % |  | N/A |  |  | N/A |  |  | N/A |
(1) Net periodic benefit cost and other amounts recognized in other comprehensive income for the assumed HeritageBank defined benefit pension plan were recognized in the Company’s results of operations beginning on the date of acquisition; therefore, disclosure of amounts recognized in prior periods is not necessary.
Future estimated benefit payments under the defined benefit pension plan and post-retirement health and life plan | Future estimated benefit payments under the Renasant defined benefit pension plan and post-retirement health and life plan are as follows:
| Pension Benefits Renasant |  | Other Benefits
2017 | $ | 2,050 |  |  | $ | 247 |
2018 | 2,073 |  |  | 241 |
2019 | 2,080 |  |  | 203 |
2020 | 2,080 |  |  | 184 |
2021 | 2,084 |  |  | 180 |
2022 - 2026 | 9,983 |  |  | 616 |
Amounts recognized in accumulated other comprehensive income, net of tax | Amounts recognized in accumulated other comprehensive income, before tax, for the year ended December 31, 2016 are as follows:
| Pension Benefits Renasant |  | Other Benefits
Prior service cost | $ | — |  |  | $ | — |
Actuarial loss | 11,515 |  |  | 418 |
Total | $ | 11,515 |  |  | $ | 418 |
Estimated costs that will be amortized from accumulated other comprehensive income into net periodic cost | The estimated costs that will be amortized from accumulated other comprehensive income into net periodic benefit cost over the next fiscal year are as follows:
| Pension Benefits Renasant |  | Other Benefits
Prior service cost | $ | — |  |  | $ | — |
Actuarial loss | 400 |  |  | 50 |
Total | $ | 400 |  |  | $ | 50 |
Fair values of defined benefit pension plan assets by category of the firm | The fair values of these instruments are based on quoted market prices of similar instruments or a discounted cash flow model (Level 2).
| Quoted Prices In Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Totals
December 31, 2016 |  |  |  |  |  |  |
Cash and cash equivalents | $ | 1,639 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,639 |
U.S. government securities | — |  |  | 2,270 |  |  | — |  |  | 2,270 |
Corporate debt | — |  |  | 1,991 |  |  | — |  |  | 1,991 |
Corporate stocks | 17,823 |  |  | — |  |  | — |  |  | 17,823 |
Investments in registered investment companies | 871 |  |  | — |  |  | — |  |  | 871 |
Foreign obligations | — |  |  | 647 |  |  | — |  |  | 647 |
Municipal obligations | — |  |  | — |  |  | — |  |  | — |
| $ | 20,333 |  |  | $ | 4,908 |  |  | $ | — |  |  | $ | 25,241 |
| Quoted Prices In Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Totals
December 31, 2015 |  |  |  |  |  |  |
Cash and cash equivalents | $ | 13,927 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,927 |
U.S. government securities | — |  |  | 1,883 |  |  | — |  |  | 1,883 |
Corporate debt | — |  |  | 2,442 |  |  | — |  |  | 2,442 |
Corporate stocks | 17,383 |  |  | — |  |  | — |  |  | 17,383 |
Investments in registered investment companies | 848 |  |  | — |  |  | — |  |  | 848 |
Foreign obligations | — |  |  | 308 |  |  | — |  |  | 308 |
Municipal obligations | — |  |  | 101 |  |  | — |  |  | 101 |
| $ | 32,158 |  |  | $ | 4,734 |  |  | $ | — |  |  | $ | 36,892 |
Summarizes information about options issued under the long-term equity incentive plan | The following table summarizes information about options issued under the long-term equity incentive plan as of and for the three years ended December 31, 2016:
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value
Outstanding at January 1, 2014 | 1,060,348 |  |  | $ | 18.64 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | (227,499 | ) |  | 18.39 |  |  |  |  |
Forfeited | (1,899 | ) |  | 20.77 |  |  |  |  |
Outstanding at December 31, 2014 | 830,950 |  |  | $ | 18.70 |  |  | 4.48 |  | $ | 8,680 |
Exercisable at December 31, 2014 | 745,949 |  |  | $ | 18.95 |  |  | 4.15 |  | $ | 7,628 |
Granted | — |  |  | — |  |  |  |  |
Exercised | (201,371 | ) |  | 20.82 |  |  |  |  |
Forfeited | (8,133 | ) |  | 29.45 |  |  |  |  |
Outstanding at December 31, 2015 | 621,446 |  |  | $ | 17.88 |  |  | 3.91 |  | $ | 10,274 |
Exercisable at December 31, 2015 | 606,027 |  |  | $ | 17.85 |  |  | 3.83 |  | $ | 10,038 |
Granted | — |  |  | — |  |  |  |  |
Exercised | (435,177 | ) |  | 18.67 |  |  |  |  |
Forfeited | (644 | ) |  | 29.67 |  |  |  |  |
Outstanding at December 31, 2016 | 185,625 |  |  | $ | 15.97 |  |  | 3.91 |  | $ | 4,872 |
Exercisable at December 31, 2016 | 185,625 |  |  | $ | 15.97 |  |  | 3.91 |  | $ | 4,872 |
Summary of the changes in restricted stock | The following table summarizes the changes in restricted stock as of and for the year ended December 31, 2016:
| Performance- Based Restricted Stock(1) |  | Weighted Average Grant-Date Fair Value |  | Time- Based Restricted Stock |  | Weighted Average Grant-Date Fair Value
Nonvested at beginning of year | — |  |  | $ | — |  |  | 105,438 |  |  | $ | 31.04 |
Granted | 61,700 |  |  | 31.12 |  |  | 52,005 |  |  | 31.74 |
Vested | (52,045 | ) |  | 31.12 |  |  | (21,138 | ) |  | 27.53 |
Cancelled | (9,655 | ) |  | 31.12 |  |  | (18,960 | ) |  | 32.40 |
Nonvested at end of year | — |  |  | $ | — |  |  | 117,345 |  |  | $ | 31.76 |
(1) In January 2016, the Company awarded 61,700 shares of performance-based restricted stock based on the target level of performance goals. The Company's year-end results were between the threshold and target performance levels; therefore, 9,655 shares were cancelled for a total award of 52,045 shares.

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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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