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Postretirement Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |
Obligations and Funded Status | Obligations and Funded Status at December 31
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Change in benefit obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 171,358 |  |  | $ | 162,727 |  |  | $ | 24,048 |  |  | $ | 22,034 |
Interest cost |  |  | 6,194 |  |  |  | 6,651 |  |  |  | 565 |  |  |  | 592 |
Actuarial (gain) loss |  |  | (11,494 | ) |  |  | 9,109 |  |  |  | (2,129 | ) |  |  | (156 | )
Benefits paid |  |  | (7,464 | ) |  |  | (7,129 | ) |  |  | (1,255 | ) |  |  | (516 | )
Foreign exchange impact |  |  | — |  |  |  | — |  |  |  | (1,223 | ) |  |  | 2,094 |
Benefit obligation at end of year |  | $ | 158,594 |  |  | $ | 171,358 |  |  | $ | 20,006 |  |  | $ | 24,048 |
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Change in plan assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 147,908 |  |  | $ | 137,092 |  |  | $ | 24,168 |  |  | $ | 20,336 |
Actual return (loss) on plan assets |  |  | (11,558 | ) |  |  | 15,533 |  |  |  | (1,583 | ) |  |  | 1,957 |
Employer contributions |  |  | 5,312 |  |  |  | 2,412 |  |  |  | 494 |  |  |  | 365 |
Benefits paid |  |  | (7,464 | ) |  |  | (7,129 | ) |  |  | (1,254 | ) |  |  | (516 | )
Foreign exchange impact |  |  | — |  |  |  | — |  |  |  | (1,249 | ) |  |  | 2,026 |
Fair value of plan assets at end of year |  | $ | 134,198 |  |  | $ | 147,908 |  |  | $ | 20,576 |  |  | $ | 24,168 |
Over (Under) funded status at end of year |  | $ | (24,396 | ) |  | $ | (23,450 | ) |  | $ | 570 |  |  | $ | 120 |
Schedule of Amounts Recognized in Balance Sheets | The amounts recognized in the consolidated balance sheets at December 31 consisted of:
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Non-current asset |  | $ | — |  |  | $ | — |  |  | $ | 570 |  |  | $ | 120 |
Current liability |  |  | (302 | ) |  |  | (302 | ) |  |  | — |  |  |  | — |
Non-current liability |  |  | (24,094 | ) |  |  | (23,148 | ) |  |  | — |  |  |  | — |
Net amount recognized |  | $ | (24,396 | ) |  | $ | (23,450 | ) |  | $ | 570 |  |  | $ | 120 |
Amounts Recognized in Accumulated Other Comprehensive Income | The amounts recognized in accumulated other comprehensive income at December 31 consisted of:
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Net actuarial loss |  | $ | 45,334 |  |  | $ | 39,801 |  |  | $ | 5,849 |  |  | $ | 5,743 |
Information for Pension Plans with Projected Benefit Obligations in Excess of Plan Assets | Below is information for pension plans with projected benefit obligations in excess of plan assets at December 31:
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Projected benefit obligation |  | $ | 158,594 |  |  | $ | 171,358 |  |  | $ | — |  |  | $ | — |
Accumulated benefit obligation |  |  | 158,594 |  |  |  | 171,358 |  |  |  | — |  |  |  | — |
Fair value of plan assets |  |  | 134,198 |  |  |  | 147,908 |  |  |  | — |  |  |  | — |
Components of Net Periodic Benefit Cost | Net periodic benefit costs for the years ended December 31, 2018, 2017 and 2016, were as follows:
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2018 |  |  | 2017 |  |  | 2016 |
Interest cost |  | $ | 6,194 |  |  | $ | 6,651 |  |  | $ | 6,934 |  |  | $ | 565 |  |  | $ | 592 |  |  | $ | 733 |
Expected return on plan assets |  |  | (9,284 | ) |  |  | (9,288 | ) |  |  | (9,012 | ) |  |  | (885 | ) |  |  | (797 | ) |  |  | (900 | )
Amortization of net actuarial loss |  |  | 3,814 |  |  |  | 3,085 |  |  |  | 3,386 |  |  |  | 219 |  |  |  | 382 |  |  |  | 77 |
Net periodic benefit cost |  | $ | 724 |  |  | $ | 448 |  |  | $ | 1,308 |  |  | $ | (101 | ) |  | $ | 177 |  |  | $ | (90 | )
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income | Other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31, 2018, 2017 and 2016, were as follows:
(In thousands) |  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2018 |  |  | 2017 |  |  | 2016 |
Net actuarial (gain) loss |  | $ | 9,348 |  |  | $ | 2,864 |  |  | $ | (11,062 | ) |  | $ | 325 |  |  | $ | (1,318 | ) |  | $ | 3,756 |
Amortization of net actuarial loss |  |  | (3,814 | ) |  |  | (3,085 | ) |  |  | (3,386 | ) |  |  | (219 | ) |  |  | (382 | ) |  |  | (77 | )
Total recognized in other comprehensive income |  | $ | 5,534 |  |  | $ | (221 | ) |  | $ | (14,448 | ) |  | $ | 106 |  |  | $ | (1,700 | ) |  | $ | 3,679 |
Total recognized in net periodic benefit cost and other comprehensive income |  | $ | 6,258 |  |  | $ | 227 |  |  | $ | (13,140 | ) |  | $ | 5 |  |  | $ | (1,523 | ) |  | $ | 3,589 |
Estimated Amounts Reclassified from Accumulated Other Comprehensive Income into Net Periodic Benefit Cost | The estimated amounts that will be reclassified from accumulated other comprehensive income into net periodic benefit cost in 2019 are as follows:
(In thousands) |  | United States |  |  | United Kingdom |
Net actuarial loss |  | $ | 2,609 |  |  | $ | 244 |
Estimated Future Benefit Payments | Estimated Future Benefit Payments
(In thousands) |  | United States |  |  | United Kingdom |
2019 |  | $ | 8,009 |  |  | $ | 482 |
2020 |  |  | 8,443 |  |  |  | 487 |
2021 |  |  | 8,954 |  |  |  | 509 |
2022 |  |  | 9,438 |  |  |  | 553 |
2023 |  |  | 9,836 |  |  |  | 592 |
2024-2028 |  |  | 51,998 |  |  |  | 3,557 |
Defined Contribution Plan Expenses for Company's Retirement Savings Plans and Profit Sharing Plan | Defined contribution expenses for the Company’s qualified defined contribution plans were as follows:
(In thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
Retirement contributions |  | $ | 7,617 |  |  | $ | 4,998 |  |  | $ | 4,902 |
Profit sharing contributions |  |  | 4,182 |  |  |  | 7,002 |  |  |  | 6,230 |
Total |  | $ | 11,799 |  |  | $ | 12,000 |  |  | $ | 11,132 |
United States [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Company's Asset Allocations for its U.S. and U.K Pension Plans | The Company’s asset allocations for its U.S. pension plans at December 31, 2018 and 2017, by asset category, were as follows:
|  | December 31, 2018 |
(In thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash and Cash Equivalents |  | $ | 4,935 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,935 |
Equity Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Equities |  |  | 34,751 |  |  |  | — |  |  |  | — |  |  |  | 34,751 |
Non-U.S. Equities |  |  | 27,415 |  |  |  | — |  |  |  | — |  |  |  | 27,415 |
Employer Securities |  |  | 22,063 |  |  |  | — |  |  |  | — |  |  |  | 22,063 |
Total Equities |  |  | 84,229 |  |  |  | — |  |  |  | — |  |  |  | 84,229 |
Fixed Income Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Corporate Bonds |  |  | — |  |  |  | 29,659 |  |  |  | — |  |  |  | 29,659 |
U.S. Government and Agency Bonds |  |  | 6,314 |  |  |  | 3,139 |  |  |  | — |  |  |  | 9,453 |
Other Bonds |  |  | — |  |  |  | 5,922 |  |  |  | — |  |  |  | 5,922 |
Total Fixed Income |  |  | 6,314 |  |  |  | 38,720 |  |  |  | — |  |  |  | 45,034 |
Total |  | $ | 95,478 |  |  | $ | 38,720 |  |  | $ | — |  |  | $ | 134,198 |
|  | December 31, 2017 |
(In thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash and Cash Equivalents |  | $ | 4,903 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,903 |
Equity Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Equities |  |  | 37,753 |  |  |  | — |  |  |  | — |  |  |  | 37,753 |
Non-U.S. Equities |  |  | 31,581 |  |  |  | 47 |  |  |  | — |  |  |  | 31,628 |
Employer Securities |  |  | 30,197 |  |  |  | — |  |  |  | — |  |  |  | 30,197 |
Total Equities |  |  | 99,531 |  |  |  | 47 |  |  |  | — |  |  |  | 99,578 |
Fixed Income Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Corporate Bonds |  |  | — |  |  |  | 28,744 |  |  |  | — |  |  |  | 28,744 |
U.S. Government and Agency Bonds |  |  | 5,545 |  |  |  | 1,045 |  |  |  | — |  |  |  | 6,590 |
Other Bonds |  |  | — |  |  |  | 8,093 |  |  |  | — |  |  |  | 8,093 |
Total Fixed Income |  |  | 5,545 |  |  |  | 37,882 |  |  |  | — |  |  |  | 43,427 |
Total |  | $ | 109,979 |  |  | $ | 37,929 |  |  | $ | — |  |  | $ | 147,908 |
United Kingdom [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Company's Asset Allocations for its U.S. and U.K Pension Plans | The Company’s asset allocations for its U.K. pension plans at December 31, 2018 and 2017, by asset category, were as follows:
|  | December 31, 2018 |
(In thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash |  | $ | 205 |  |  | $ | — |  |  | $ | — |  |  | $ | 205 |
Equity Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pooled Pension Funds |  |  | — |  |  |  | 12,750 |  |  |  | — |  |  |  | 12,750 |
Fixed Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pooled Pension Funds |  |  | — |  |  |  | 6,378 |  |  |  | — |  |  |  | 6,378 |
Real Estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pooled Pension Funds |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Insurance Contracts |  |  | — |  |  |  | — |  |  |  | 1,243 |  |  |  | 1,243 |
Total |  | $ | 205 |  |  | $ | 19,128 |  |  | $ | 1,243 |  |  | $ | 20,576 |
|  | December 31, 2017 |
(In thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Cash |  | $ | 745 |  |  | $ | — |  |  | $ | — |  |  | $ | 745 |
Equity Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pooled Pension Funds |  |  | — |  |  |  | 14,127 |  |  |  | — |  |  |  | 14,127 |
Fixed Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pooled Pension Funds |  |  | — |  |  |  | 6,952 |  |  |  | — |  |  |  | 6,952 |
Real Estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pooled Pension Funds |  |  | — |  |  |  | 646 |  |  |  | — |  |  |  | 646 |
Insurance Contracts |  |  | — |  |  |  | — |  |  |  | 1,698 |  |  |  | 1,698 |
Total |  | $ | 745 |  |  | $ | 21,725 |  |  | $ | 1,698 |  |  | $ | 24,168 |
Fair Value Changes within Asset Categories for which Fair Value Measurements Use Significant Unobservable Inputs (Level 3) Defined Benefit United States Plans and United Kingdom Plans | Fair value changes within asset categories for which fair value measurements use significant unobservable inputs (Level 3) were as follows during 2017 and 2018:
(In thousands) |  | Insurance Contracts |
Fair value, December 31, 2016 |  | $ | 1,759 |
Sale proceeds (benefit payments) |  |  | (134 | )
Change in unrealized gain |  |  | (84 | )
Foreign exchange impact |  |  | 157 |
Fair value, December 31, 2017 |  | $ | 1,698 |
Sale proceeds (benefit payments) |  |  | (129 | )
Change in unrealized gain |  |  | (247 | )
Foreign exchange impact |  |  | (79 | )
Fair value, December 31, 2018 |  | $ | 1,243 |
Defined Benefit Plan Periodic Costs [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Weighted-Average Assumptions Used to Determine Benefit Obligations/Net Periodic Benefit Costs | The weighted-average assumptions used to determine net periodic benefit costs for years ended December 31 were as follows:
|  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2018 |  |  | 2017 |  |  | 2016 |
Discount rate |  |  | 3.67 | % |  |  | 4.17 | % |  |  | 4.39 | % |  |  | 2.40 | % |  |  | 2.60 | % |  |  | 4.00 | %
Expected long-term return on plan assets |  |  | 6.75 | % |  |  | 7.00 | % |  |  | 7.00 | % |  |  | 3.71 | % |  |  | 3.77 | % |  |  | 4.59 | %
Benefit Obligation [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Weighted-Average Assumptions Used to Determine Benefit Obligations/Net Periodic Benefit Costs | The weighted-average assumptions used to determine benefit obligations at December 31 were as follows:
|  | United States |  |  | United Kingdom |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Discount rate |  |  | 4.30 | % |  |  | 3.67 | % |  |  | 2.80 | % |  |  | 2.40 | %

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