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Employee Benefit Plans (Details 1) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2015
Amounts recognized in consolidated balance sheets |  |  |
Pensions | $ 62,214 | $ 59,338 |
Net loss |  |  |
Expected benefit payments | 10,133 |  |
401(k) retirement plan |  |  |
Expense recognized in the 401(k) retirement plan | 400 | 3,000 |
Pension Plan |  |  |
Change in benefit obligation |  |  |
Benefit obligation at beginning of year | 187,036 | 179,247 |
Interest cost | 6,740 | 7,347 |
Actuarial (gain) loss | (12,021) | 10,121 |
Benefits paid | (9,994) | (9,679) |
Benefit obligation at end of year | 171,761 | 187,036 |
Change in plan assets |  |  |
Fair value of plan assets at beginning of year | 126,013 | 116,725 |
Actual return on plan assets | (9,847) | 17,292 |
Contributions | 1,690 | 1,675 |
Benefits paid | (9,994) | (9,679) |
Fair value of plan assets at end of year | 107,862 | 126,013 |
Funded status at end of year | (63,899) | (61,023) |
Amounts recognized in consolidated balance sheets |  |  |
Other current liabilities | 1,685 | 1,685 |
Pensions | 62,214 | 59,338 |
Total | 63,899 | 61,023 |
Net loss |  |  |
Total | 46,584 | 45,418 |
Expected benefit payments | 2,200 |  |
Accumulated benefit obligation |  |  |
Projected benefit obligation | 171,761 | 187,036 |
Accumulated benefit obligation | 171,761 | 187,036 |
Fair value of plan assets | 107,862 | 126,013 |
Net Periodic Benefit Cost (Pre-Tax) |  |  |
Interest cost | 6,740 | 7,347 |
Expected return on plan assets | (6,094) | (7,328) |
Recognized actuarial loss | 2,754 | 2,754 |
Net periodic benefit cost | 3,400 | 2,773 |
Amounts Recognized in Other Comprehensive Income (Loss) (Pre-Tax) |  |  |
Net (gain) loss | 1,166 | (2,597) |
Net cost recognized in net periodic benefit cost and other comprehensive (income) loss | 4,566 | $ 176 |
Estimated net loss that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in next fiscal year | $ 2,900 |  |
Amortization period |  |  | 23 years
Weighted-average assumptions used to determine net periodic benefit cost |  |  |
Discount rate (as a percent) | 3.67% | 4.21% |
Expected return on plan assets (as a percent) | 5.00% | 6.50% |
Weighted-average assumptions used to determine benefit obligations |  |  |
Discount rate (as a percent) | 4.35% | 3.67% |
Period considered for compounded returns | 15 years |  |
Restoration Pension Plan |  |  |
Net loss |  |  |
Expected benefit payments | $ 1,700 |  |
Accumulated benefit obligation |  |  |
Accumulated benefit obligation | $ 25,300 | $ 27,600 |

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