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EMPLOYEE BENEFIT PLANS Benefit Obligations, Plan Assets, and Funded Status (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Retirement Benefits [Abstract] |  |  |
Accumulated Benefit Obligation (ABO) at December 31 | $ 104,649 | $ 78,746 |
PBO at beginning of year | 105,515 | 120,319 |
Service cost | 4,602 | 5,242 | $ 4,328
Interest cost | 4,362 | 4,137 | 3,912
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant | 736 | 745 |
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 5,695 | 5,969 | 5,562
Defined Benefit Plan, Amortization of Gain (Loss) | 63 | 46 | 149
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] | 18,591 | (11,644) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 4,459 | 3,892 |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 63 | 46 | 149
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax | 11,586 | (5,204) | 8,742
PBO at end of year | 134,852 | 105,515 | 120,319
Plan assets at beginning of year | 86,556 | 97,182 |
Actual return on plan assets | 12,763 | (425) |
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant | 736 | 745 |
Company contributions | 3,198 | 372 |
Defined Benefit Plan, Plan Assets, Benefits Paid | 4,459 | 3,892 |
Plan assets at end of year | 103,385 | 86,556 | $ 97,182
Funded status | (31,467) | (18,959) |
Current liabilities | (383) | (364) |
Non-current liabilities | (31,084) | (18,595) |
Net pension liability at end of year | (31,467) | (18,959) |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax | 8,890 | (2,696) |
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) | 5,505 | (9,392) |
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) | 4,591 | (7,426) |
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax | $ 8,890 | $ (2,696) |

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