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Post-Retirement Benefits (Tables) | 12 Months Ended
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Dec. 31, 2019
SCBT Post-retirement Benefit Plan |
Post-Retirement Benefits |
Schedule of the plan's funded status and amounts recognized in the Company's accompanying consolidated financial statements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
(Dollars in thousands) | ​ | 2019 | ​ | 2018 | ​ | 2017 |
Change in benefit obligation: |  | ​ |  |  | ​ |  |  | ​ |  | ​
Benefit obligation at beginning of year | ​ | $ | 309 | ​ | $ | 337 | ​ | $ | 393 | ​
Interest cost | ​ |  | 11 | ​ |  | 11 | ​ |  | 13 | ​
Actuarial loss | ​ |  | (33) | ​ |  | 2 | ​ |  | (29) | ​
Benefits paid | ​ |  | (33) | ​ |  | (41) | ​ |  | (40) | ​
Benefit obligation at end of year | ​ |  | 254 | ​ |  | 309 | ​ |  | 337 | ​
Change in plan assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of plan assets at beginning of year | ​ |  | — | ​ |  | — | ​ |  | — | ​
Employer contribution | ​ |  | 33 | ​ |  | 41 | ​ |  | 40 | ​
Benefits paid | ​ |  | (33) | ​ |  | (41) | ​ |  | (40) | ​
Fair value of plan assets at end of year | ​ |  | — | ​ |  | — | ​ |  | — | ​
Funded status | ​ | $ | (254) | ​ | $ | (309) | ​ | $ | (337) | ​
Schedule of weighted average assumptions used to determine benefit obligations and net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
​ | ​ | 2019 | ​ | 2018 | ​ | 2017 |
Weighted-average assumptions used to determine benefit obligation at December 31: |  |  |  |  |  |  | ​
Discount rate |  | 2.70 | % | 3.80 | % | 3.20 | %
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Discount rate |  | 3.80 | % | 3.20 | % | 3.50 | %
Assumed health care cost trend rates at December 31: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Health care cost trend rate assumed for next year |  | 5.00 | % | 5.00 | % | 5.00 | %
Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
(Dollars in thousands) | ​ | 2019 | ​ | 2018 | ​ | 2017 |
Interest cost |  | $ | 11 |  | $ | 10 |  | $ | 13 | ​
Recognized net actuarial loss | ​ |  | 6 | ​ |  | 6 | ​ |  | 10 | ​
Net periodic benefit cost | ​ |  | 17 | ​ |  | 16 | ​ |  | 23 | ​
Net (gain) loss | ​ |  | (33) | ​ |  | 2 | ​ |  | (29) | ​
Amortization of gain | ​ |  | (6) | ​ |  | (6) | ​ |  | (10) | ​
Total amount recognized in other comprehensive income | ​ |  | (39) | ​ |  | (4) | ​ |  | (39) | ​
Total recognized in net periodic benefit cost and other comprehensive income | ​ | $ | (22) | ​ | $ | 12 | ​ | $ | (16) | ​
Schedule of effects of one-percentage-point change in assumed health care cost trend rates | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | One-Percentage Point |
(Dollars in thousands) | ​ | Increase | ​ | Decrease |
Effect on total of interest cost |  | $ | 1 |  | $ | (1) | ​
Effect on postretirement benefit obligation | ​ |  | 13 | ​ |  | (12) | ​
Schedule of estimated future benefit payments (including expected future service as appropriate) | ​
​ | ​ | ​ | ​ | ​
(Dollars in thousands) |  |  | ​ |
2020 | ​ | $ | 31 | ​
2021 | ​ |  | 30 | ​
2022 | ​ |  | 28 | ​
2023 | ​ |  | 27 | ​
2024 | ​ |  | 25 | ​
2025-2029 | ​ |  | 95 | ​
​ | ​ | $ | 236 | ​
FFCH Post-retirement Benefit Plan |
Post-Retirement Benefits |
Schedule of the plan's funded status and amounts recognized in the Company's accompanying consolidated financial statements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​
(Dollars in thousands) |  | 2019 |  | 2018 |  | 2017 | ​
Change in benefit obligation: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Benefit obligation at beginning of year | ​ | $ | 2,281 | ​ | $ | 2,392 | ​ | $ | 2,447 | ​
Interest cost | ​ | ​ | 82 | ​ |  | 73 | ​ |  | 81 | ​
Actuarial loss | ​ | ​ | 7 | ​ |  | 89 | ​ |  | 126 | ​
Benefits paid | ​ | ​ | (273) | ​ |  | (286) | ​ |  | (274) | ​
Less: Federal subsidy on benefits paid | ​ | ​ | 12 | ​ |  | 13 | ​ |  | 12 | ​
Benefit obligation at end of year | ​ | ​ | 2,109 | ​ |  | 2,281 | ​ |  | 2,392 | ​
Change in plan assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of plan assets at beginning of year | ​ | ​ | — | ​ |  | — | ​ |  | — | ​
Employer contribution | ​ | ​ | 261 | ​ |  | 286 | ​ |  | 274 | ​
Participants’ contributions | ​ | ​ | 12 | ​ |  | — | ​ |  | — | ​
Benefits paid | ​ | ​ | (273) | ​ |  | (286) | ​ |  | (274) | ​
Fair value of plan assets at end of year | ​ | ​ | — | ​ |  | — | ​ |  | — | ​
Funded status | ​ | $ | (2,109) | ​ | $ | (2,281) | ​ | $ | (2,392) | ​
Schedule of weighted average assumptions used to determine benefit obligations and net periodic benefit cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
​ |  | 2019 |  | 2018 | ​ | 2017 | ​
Weighted-average assumptions used to determine benefit obligation at December 31: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Discount rate | ​ | 2.70 | % | 3.80 | % | 3.20 | %
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Discount rate | ​ | 3.80 | % | 3.20 | % | 3.50 | %
Assumed health care cost trend rates at December 31: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Health care cost trend rate assumed for next year | ​ | 5.00 | % | 5.00 | % | 5.00 | %
Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
(Dollars in thousands) |  | 2019 |  | 2018 |  | 2017 |
Interest cost | ​ | $ | 82 | ​ | $ | 73 | ​ | $ | 81 | ​
Recognized net actuarial loss | ​ | ​ | 160 | ​ |  | 154 | ​ |  | 147 | ​
Net periodic benefit cost | ​ | ​ | 242 | ​ |  | 227 | ​ |  | 228 | ​
Net loss | ​ | ​ | 7 | ​ |  | 89 | ​ |  | 126 | ​
Amortization of loss | ​ | ​ | (160) | ​ |  | (154) | ​ |  | (147) | ​
Total amount recognized in other comprehensive income | ​ | ​ | (153) | ​ |  | (65) | ​ |  | (21) | ​
Total recognized in net periodic benefit cost and other comprehensive income | ​ | $ | 89 | ​ | $ | 162 | ​ | $ | 207 | ​
Schedule of effects of one-percentage-point change in assumed health care cost trend rates | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | One-Percentage Point |
(Dollars in thousands) | ​ | Increase | ​ | Decrease |
Effect on aggregate service and interest cost |  | $ | 5 |  | $ | (5) | ​
Effect on postretirement benefit obligation | ​ | ​ | 130 | ​ | ​ | (118) | ​
Schedule of estimated future benefit payments (including expected future service as appropriate) | Estimated future benefit payments (including expected future service as appropriate): ​
​ | ​ | ​ | ​ | ​
(Dollars in thousands) |  |  | ​ |
2020 | ​ | $ | 240 | ​
2021 | ​ |  | 230 | ​
2022 | ​ |  | 218 | ​
2023 | ​ |  | 206 | ​
2024 | ​ |  | 193 | ​
2025-2029 | ​ |  | 752 | ​
​ | ​ | $ | 1,839 | ​

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