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Pension and Profit Sharing (Tables) | 12 Months Ended
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Dec. 31, 2017
Retirement Benefits [Abstract] |
Plan Asset Allocation |
Asset Category | 2017 | 2016
Equity Securities | 67% | 65%
Fixed Income Securities | 32% | 32%
Other Securities / Investments | 1% | 3%
Total | 100% | 100%
Pension Plan Assets by Level |
2017 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Money Market Fund |  | $ | — |  |  | $ | 10,774 |  |  | $ | — |  |  | $ | 10,774 |
Equity Common and Collected Funds |  |  | 125,451 |  |  |  | 711,143 |  |  |  | — |  |  |  | 836,594 |
Fixed Income Common and Collected Funds |  |  | 100,430 |  |  |  | 302,001 |  |  |  | — |  |  |  | 402,431 |
Total |  | $ | 225,881 |  |  | $ | 1,023,918 |  |  | $ | — |  |  | $ | 1,249,799 |
2016 |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Money Market Fund |  | $ | 19,327 |  |  | $ | 19,897 |  |  | $ | — |  |  | $ | 39,224 |
Equity Common and Collected Funds |  |  | 131,737 |  |  |  | 705,523 |  |  |  | — |  |  |  | 837,260 |
Fixed Income Common and Collected Funds |  |  | 104,491 |  |  |  | 313,752 |  |  |  | — |  |  |  | 418,243 |
Total |  | $ | 255,555 |  |  | $ | 1,039,172 |  |  | $ | — |  |  | $ | 1,294,727 |
Changes in Benefit Obligation |
|  | 2017 |  | 2016
Assumptions used to determine benefit obligation: |  |  |  |  |  |  |  |
Discount rate |  |  | 3.14 | % |  |  | 3.40 | %
Changes in benefit obligation: |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | (1,499,798 | ) |  | $ | (1,776,788 | )
Interest cost |  |  | (48,161 | ) |  |  | (55,811 | )
Service cost |  |  | (36,000 | ) |  |  | (36,000 | )
Actuarial (loss) gain |  |  | (20,289 | ) |  |  | 99,019 |
Benefits and plan expenses paid |  |  | 241,381 |  |  |  | 269,782 |
Benefit obligation at end of year |  |  | (1,362,867 | ) |  |  | (1,499,798 | )
Changes in plan assets: |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  |  | 1,294,727 |  |  |  | 1,417,572 |
Actual return on plan assets |  |  | 196,479 |  |  |  | 146,937 |
Employer contribution |  |  |  |  |  |  |  |
Benefits and plan expenses paid |  |  | (241,381 | ) |  |  | (269,782 | )
Fair value of plan assets at end of year |  |  | 1,249,825 |  |  |  | 1,294,727 |
Funded status |  | $ | (113,042 | ) |  | $ | (205,071 | )
Amounts recognized in Accumulated Other Comprehensive Income: |  |  |  |  |  |  |  |
Net actuarial loss |  | $ | 913,870 |  |  | $ | 1,128,647 |
Prior service cost |  |  | 1,625 |  |  |  | 2,168 |
Total |  | $ | 915,495 |  |  | $ | 1,130,815 |
Components of Net Benefit Expense |
|  | 2017 |  | 2016
Assumptions used to determine net periodic benefit cost: |  |  |  |  |  |  |  |
Discount rate |  |  | 3.40 | % |  |  | 3.50 | %
Expected return on plan assets |  |  | 6.00 | % |  |  | 6.00 | %
Components of net benefit expense: |  |  |  |  |  |  |  |
Interest cost |  | $ | 48,161 |  |  | $ | 55,811 |
Service cost |  |  | 36,000 |  |  |  | 36,000 |
Expected return on plan assets |  |  | (69,465 | ) |  |  | (76,138 | )
Amortization of prior service costs |  |  | 543 |  |  |  | 543 |
Amortization of actuarial loss |  |  | 108,052 |  |  |  | 124,854 |
Net periodic benefit cost |  | $ | 123,291 |  |  | $ | 141,070 |
Amounts Recognized in Other Comprehensive Income |
|  | 2017 |  | 2016
Balance at beginning of the year |  | $ | 1,130,815 |  |  | $ | 1,426,030 |
Change in net loss |  |  | (106,725 | ) |  |  | (169,818 | )
Amortization of actuarial loss |  |  | (108,052 | ) |  |  | (124,854 | )
Amortization of prior service cost |  |  | (543 | ) |  |  | (543 | )
Change recognized in other comprehensive income |  |  | (215,320 | ) |  |  | (295,215 | )
Total recognized in other comprehensive income |  | $ | 915,495 |  |  | $ | 1,130,815 |
Benefits Expected to be Paid |
| 2018 |  |  | $ | 186,000 |
| 2019 |  |  |  | 169,000 |
| 2020 |  |  |  | 152,000 |
| 2021 |  |  |  | 137,000 |
| 2022 |  |  |  | 122,000 |
| Years 2023 - 2027 |  |  |  | 439,000 |

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