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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Schedule of Assets by Investment Type | The following schedule summarizes the assets of the Chesapeake Pension Plan and the FPU Pension Plan, by investment type, at December 31, 2018, 2017 and 2016:
| Chesapeake Pension Plan |  | FPU Pension Plan
At December 31, | 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
Asset Category |  |  |  |  |  |  |  |  |  |  |
Equity securities | 49.02 | % |  | 52.70 | % |  | 52.93 | % |  | 50.04 | % |  | 55.17 | % |  | 53.18 | %
Debt securities | 40.98 | % |  | 37.79 | % |  | 37.64 | % |  | 41.06 | % |  | 36.56 | % |  | 37.74 | %
Other | 10.00 | % |  | 9.51 | % |  | 9.43 | % |  | 8.90 | % |  | 8.27 | % |  | 9.08 | %
Total | 100.00 | % |  | 100.00 | % |  | 100.00 | % |  | 100.00 | % |  | 100.00 | % |  | 100.00 | %
Schedule of Asset Allocation Strategy | The following allocation range of asset classes is intended to produce a rate of return sufficient to meet the plans’ goals and objectives:
Asset Allocation Strategy
Asset Class | Minimum Allocation Percentage |  | Maximum Allocation Percentage
Domestic Equities (Large Cap, Mid Cap and Small Cap) | 14 | % |  | 32 | %
Foreign Equities (Developed and Emerging Markets) | 13 | % |  | 25 | %
Fixed Income (Inflation Bond and Taxable Fixed) | 26 | % |  | 40 | %
Alternative Strategies (Long/Short Equity and Hedge Fund of Funds) | 6 | % |  | 14 | %
Diversifying Assets (High Yield Fixed Income, Commodities, and Real Estate) | 7 | % |  | 19 | %
Cash | 0 | % |  | 5 | %
Summary of Pension Plan Assets | At December 31, 2018 and 2017, the assets of the Chesapeake Pension Plan and the FPU Pension Plan were comprised of the following investments:
| Fair Value Measurement Hierarchy
| At December 31, 2018 |  | At December 31, 2017
Asset Category | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
(in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual Funds - Equity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Large Cap (1) | $ | 3,399 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,399 |  |  | $ | 4,245 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,245 |
U.S. Mid Cap (1) | 1,478 |  |  | — |  |  | — |  |  | 1,478 |  |  | 1,775 |  |  | — |  |  | — |  |  | 1,775 |
U.S. Small Cap (1) | 670 |  |  | — |  |  | — |  |  | 670 |  |  | 918 |  |  | — |  |  | — |  |  | 918 |
International (2) | 9,226 |  |  | — |  |  | — |  |  | 9,226 |  |  | 11,916 |  |  | — |  |  | — |  |  | 11,916 |
Alternative Strategies (3) | 5,726 |  |  | — |  |  | — |  |  | 5,726 |  |  | 5,528 |  |  | — |  |  | — |  |  | 5,528 |
| 20,499 |  |  | — |  |  | — |  |  | 20,499 |  |  | 24,382 |  |  | — |  |  | — |  |  | 24,382 |
Mutual Funds - Debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed income (4) | 18,630 |  |  | — |  |  | — |  |  | 18,630 |  |  | 18,454 |  |  | — |  |  | — |  |  | 18,454 |
High Yield (4) | 2,818 |  |  | — |  |  | — |  |  | 2,818 |  |  | 2,772 |  |  | — |  |  | — |  |  | 2,772 |
| 21,448 |  |  | — |  |  | — |  |  | 21,448 |  |  | 21,226 |  |  | — |  |  | — |  |  | 21,226 |
Mutual Funds - Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodities (5) | 1,902 |  |  | — |  |  | — |  |  | 1,902 |  |  | 2,154 |  |  | — |  |  | — |  |  | 2,154 |
Real Estate (6) | 2,216 |  |  | — |  |  | — |  |  | 2,216 |  |  | 2,300 |  |  | — |  |  | — |  |  | 2,300 |
Guaranteed deposit (7) | — |  |  | — |  |  | 627 |  |  | 627 |  |  | — |  |  | — |  |  | 436 |  |  | 436 |
| 4,118 |  |  | — |  |  | 627 |  |  | 4,745 |  |  | 4,454 |  |  | — |  |  | 436 |  |  | 4,890 |
Total Pension Plan Assets in fair value hierarchy | $ | 46,065 |  |  | $ | — |  |  | $ | 627 |  |  | 46,692 |  |  | $ | 50,062 |  |  | $ | — |  |  | $ | 436 |  |  | 50,498 |
Investments measured at net asset value (8) |  |  |  |  |  |  | 5,558 |  |  |  |  |  |  |  |  | 7,248 |
Total Pension Plan Assets |  |  |  |  |  |  | $ | 52,250 |  |  |  |  |  |  |  |  | $ | 57,746 |
Schedule of Level Three Defined Benefit Plan Assets Roll Forward | The following table sets forth the summary of the changes in the fair value of Level 3 investments for the years ended December 31, 2018 and 2017:
| For the Year Ended December 31,
| 2018 |  | 2017
(in thousands) |  |  |
Balance, beginning of year | $ | 436 |  |  | $ | 498 |
Purchases | 1,674 |  |  | 2,271 |
Transfers in | 2,375 |  |  | 1,743 |
Disbursements | (3,872 | ) |  | (4,101 | )
Investment income | 14 |  |  | 25 |
Balance, end of year | $ | 627 |  |  | $ | 436 |
Schedule of Amounts Not Yet Reflected in Net Periodic Benefit Cost and Included in Accumulated Other Comprehensive Income Loss or Regulatory Assets | The following table presents the amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive loss or as a regulatory asset as of December 31, 2018:
(in thousands) | Chesapeake Pension Plan |  | FPU Pension Plan |  | Chesapeake SERP |  | Chesapeake Postretirement Plan |  | FPU Medical Plan |  | Total
Prior service cost (credit) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (524 | ) |  | $ | — |  |  | $ | (524 | )
Net loss (gain) | 3,865 |  |  | 18,544 |  |  | 559 |  |  | 578 |  |  | (79 | ) |  | 23,467 |
Total | $ | 3,865 |  |  | $ | 18,544 |  |  | $ | 559 |  |  | $ | 54 |  |  | $ | (79 | ) |  | $ | 22,943 |
Accumulated other comprehensive loss (gain) pre-tax(1) | $ | 3,865 |  |  | $ | 3,523 |  |  | $ | 559 |  |  | $ | 54 |  |  | $ | (15 | ) |  | $ | 7,986 |
Post-merger regulatory asset | — |  |  | 15,021 |  |  | — |  |  | — |  |  | (64 | ) |  | 14,957 |
Subtotal | 3,865 |  |  | 18,544 |  |  | 559 |  |  | 54 |  |  | (79 | ) |  | 22,943 |
Pre-merger regulatory asset | — |  |  | 543 |  |  | — |  |  | — |  |  | 14 |  |  | 557 |
Total unrecognized cost | $ | 3,865 |  |  | $ | 19,087 |  |  | $ | 559 |  |  | $ | 54 |  |  | $ | (65 | ) |  | $ | 23,500 |
(1) The total amount of accumulated other comprehensive loss recorded on our consolidated balance sheet as of December 31, 2018 is net of income tax benefits of $2.1 million.
Schedule of Estimated Future Benefit Payments | The schedule below shows the estimated future benefit payments for each of the plans previously described:
| Chesapeake Pension Plan(1) |  | FPU Pension Plan(1) |  | Chesapeake SERP(2) |  | Chesapeake Postretirement Plan(2) |  | FPU Medical Plan(2)
(in thousands) |  |  |  |  |  |  |  |  |
2019 | $ | 528 |  |  | $ | 3,091 |  |  | $ | 383 |  |  | $ | 96 |  |  | $ | 94 |
2020 | $ | 529 |  |  | $ | 3,221 |  |  | $ | 150 |  |  | $ | 85 |  |  | $ | 87 |
2021 | $ | 736 |  |  | $ | 3,299 |  |  | $ | 148 |  |  | $ | 82 |  |  | $ | 91 |
2022 | $ | 595 |  |  | $ | 3,485 |  |  | $ | 147 |  |  | $ | 81 |  |  | $ | 93 |
2023 | $ | 1,244 |  |  | $ | 3,558 |  |  | $ | 145 |  |  | $ | 64 |  |  | $ | 80 |
Years 2024 through 2028 | $ | 3,866 |  |  | $ | 18,570 |  |  | $ | 744 |  |  | $ | 275 |  |  | $ | 402 |
(1) The pension plan is funded; therefore, benefit payments are expected to be paid out of the plan assets. (2) Benefit payments are expected to be paid out of our general funds.
Pension benefit |
Component of Net Periodic Pension Cost (Benefit) |
| Chesapeake Pension Plan |  | FPU Pension Plan |  | Chesapeake SERP
For the Years Ended December 31, | 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
(in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Components of net periodic pension cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest cost | $ | 384 |  |  | $ | 402 |  |  | $ | 421 |  |  | $ | 2,339 |  |  | $ | 2,482 |  |  | $ | 2,525 |  |  | $ | 83 |  |  | $ | 89 |  |  | $ | 91 |
Expected return on assets | (542 | ) |  | (495 | ) |  | (501 | ) |  | (3,091 | ) |  | (2,779 | ) |  | (2,702 | ) |  | — |  |  | — |  |  |
Amortization of actuarial loss | 343 |  |  | 399 |  |  | 459 |  |  | 404 |  |  | 513 |  |  | 519 |  |  | 101 |  |  | 87 |  |  | 87 |
Settlement expense | — |  |  | — |  |  | 161 |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |
Net periodic pension cost(1) | 185 |  |  | 306 |  |  | 540 |  |  | (348 | ) |  | 216 |  |  | 342 |  |  | 184 |  |  | 176 |  |  | 178 |
Amortization of pre-merger regulatory asset | — |  |  | — |  |  | — |  |  | 761 |  |  | 761 |  |  | 761 |  |  | — |  |  | — |  |  | — |
Total periodic cost | $ | 185 |  |  | $ | 306 |  |  | $ | 540 |  |  | $ | 413 |  |  | $ | 977 |  |  | $ | 1,103 |  |  | $ | 184 |  |  | $ | 176 |  |  | $ | 178 |
Assumptions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | 3.50 | % |  | 3.75 | % |  | 3.75 | % |  | 3.75 | % |  | 4.00 | % |  | 4.00 | % |  | 3.50 | % |  | 3.75 | % |  | 3.75 | %
Expected return on plan assets | 6.00 | % |  | 6.00 | % |  | 6.00 | % |  | 6.50 | % |  | 6.50 | % |  | 6.50 | % |  | — | % |  | — | % |  | — | %
Schedule of Funded Status of Benefit Obligation and Plan Assets | The following schedule sets forth the funded status at December 31, 2018 and 2017 and the net periodic cost for the years ended December 31, 2018, 2017 and 2016 for the Chesapeake and FPU Pension Plans as well as the Chesapeake SERP:
| Chesapeake Pension Plan |  | FPU Pension Plan |  | Chesapeake SERP
At December 31, | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
(in thousands) |  |  |  |  |  |  |  |  |  |  |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |
Benefit obligation — beginning of year | $ | 11,443 |  |  | $ | 11,355 |  |  | $ | 64,664 |  |  | $ | 63,832 |  |  | $ | 2,428 |  |  | $ | 2,428 |
Interest cost | 384 |  |  | 402 |  |  | 2,339 |  |  | 2,482 |  |  | 83 |  |  | 89 |
Actuarial loss (gain) | (610 | ) |  | 454 |  |  | (4,739 | ) |  | 1,199 |  |  | (74 | ) |  | 63 |
Benefits paid | (505 | ) |  | (768 | ) |  | (2,887 | ) |  | (2,849 | ) |  | (152 | ) |  | (152 | )
Benefit obligation — end of year | 10,712 |  |  | 11,443 |  |  | 59,377 |  |  | 64,664 |  |  | 2,285 |  |  | 2,428 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets — beginning of year | 9,350 |  |  | 8,668 |  |  | 48,396 |  |  | 43,272 |  |  | — |  |  | — |
Actual return on plan assets | (647 | ) |  | 1,144 |  |  | (3,113 | ) |  | 6,025 |  |  | — |  |  | — |
Employer contributions | 451 |  |  | 306 |  |  | 1,205 |  |  | 1,948 |  |  | 152 |  |  | 152 |
Benefits paid | (505 | ) |  | (768 | ) |  | (2,887 | ) |  | (2,849 | ) |  | (152 | ) |  | (152 | )
Fair value of plan assets — end of year | 8,649 |  |  | 9,350 |  |  | 43,601 |  |  | 48,396 |  |  | — |  |  | — |
Reconciliation: |  |  |  |  |  |  |  |  |  |  |
Funded status | (2,063 | ) |  | (2,093 | ) |  | (15,776 | ) |  | (16,268 | ) |  | (2,285 | ) |  | (2,428 | )
Accrued pension cost | $ | (2,063 | ) |  | $ | (2,093 | ) |  | $ | (15,776 | ) |  | $ | (16,268 | ) |  | $ | (2,285 | ) |  | $ | (2,428 | )
Assumptions: |  |  |  |  |  |  |  |  |  |  |
Discount rate | 4.00 | % |  | 3.50 | % |  | 4.25 | % |  | 3.75 | % |  | 4.00 | % |  | 3.50 | %
Expected return on plan assets | 6.00 | % |  | 6.00 | % |  | 6.50 | % |  | 6.50 | % |  | — | % |  | — | %
Other Postretirement Benefit Plans |
Component of Net Periodic Pension Cost (Benefit) | Net periodic postretirement benefit costs for 2018, 2017, and 2016 include the following components:
| Chesapeake Postretirement Plan |  | FPU Medical Plan
For the Years Ended December 31, | 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
(in thousands) |  |  |  |  |  |  |  |  |  |  |
Components of net periodic postretirement cost: |  |  |  |  |  |  |  |  |  |  |
Interest cost | $ | 38 |  |  | $ | 41 |  |  | $ | 43 |  |  | $ | 47 |  |  | $ | 50 |  |  | $ | 55 |
Amortization of actuarial loss | 58 |  |  | 53 |  |  | 64 |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost (credit) | (77 | ) |  | (77 | ) |  | (77 | ) |  | — |  |  | — |  |  | — |
Net periodic cost | 19 |  |  | 17 |  |  | 30 |  |  | 47 |  |  | 50 |  |  | 55 |
Amortization of pre-merger regulatory asset | — |  |  | — |  |  | — |  |  | 8 |  |  | 8 |  |  | 8 |
Total periodic cost(1) | $ | 19 |  |  | $ | 17 |  |  | $ | 30 |  |  | $ | 55 |  |  | $ | 58 |  |  | $ | 63 |
Assumptions |  |  |  |  |  |  |  |  |  |  |
Discount rate | 3.50 | % |  | 3.75 | % |  | 3.75 | % |  | 3.75 | % |  | 4.00 | % |  | 4.00 | %
Schedule of Funded Status of Benefit Obligation and Plan Assets | The following table sets forth the funded status at December 31, 2018 and 2017 and the net periodic cost for the years ended December 31, 2018, 2017, and 2016:
| Chesapeake Postretirement Plan |  | FPU Medical Plan
At December 31, | 2018 |  | 2017 |  | 2018 |  | 2017
(in thousands) |  |  |  |  |  |  |
Change in benefit obligation: |  |  |  |  |  |  |
Benefit obligation — beginning of year | $ | 1,128 |  |  | $ | 1,132 |  |  | $ | 1,287 |  |  | $ | 1,349 |
Interest cost | 38 |  |  | 41 |  |  | 47 |  |  | 50 |
Plan participants contributions | 136 |  |  | 118 |  |  | 41 |  |  | 48 |
Actuarial loss (gain) | (131 | ) |  | 72 |  |  | (89 | ) |  | (48 | )
Benefits paid | (169 | ) |  | (235 | ) |  | (99 | ) |  | (112 | )
Benefit obligation — end of year | 1,002 |  |  | 1,128 |  |  | 1,187 |  |  | 1,287 |
Change in plan assets: |  |  |  |  |  |  |
Fair value of plan assets — beginning of year | — |  |  | — |  |  | — |  |  | — |
Employer contributions(1) | 33 |  |  | 117 |  |  | 58 |  |  | 64 |
Plan participants contributions | 136 |  |  | 118 |  |  | 41 |  |  | 48 |
Benefits paid | (169 | ) |  | (235 | ) |  | (99 | ) |  | (112 | )
Fair value of plan assets — end of year | — |  |  | — |  |  | — |  |  | — |
Reconciliation: |  |  |  |  |  |  |
Funded status | (1,002 | ) |  | (1,128 | ) |  | (1,187 | ) |  | (1,287 | )
Accrued postretirement cost | $ | (1,002 | ) |  | $ | (1,128 | ) |  | $ | (1,187 | ) |  | $ | (1,287 | )
Assumptions: |  |  |  |  |  |  |
Discount rate | 4.00 | % |  | 3.50 | % |  | 4.25 | % |  | 3.75 | %
(1) The Chesapeake Postretirement Plan does not receive a Medicare Part-D subsidy. The FPU Medical Plan did not receive a significant subsidy for the post-merger period.

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