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SEGMENT INFORMATION (REVENUE GEOGRAPHY) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 2,207,587 | $ 2,462,817 | $ 2,443,707
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 662,117 | 752,516 | 857,643
Other Assets, Noncurrent | 101,486 | 101,573 | 67,734
United States Canada [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,497,887 | 1,710,716 | 1,738,053
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 427,631 | 506,092 | 631,459
Other Assets, Noncurrent | 89,849 | 90,810 | 56,372
Philippines Asia Pacific India [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 419,856 | 477,455 | 457,526
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 150,567 | 170,403 | 162,857
Other Assets, Noncurrent | 9,298 | 7,752 | 8,826
EMEA [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 174,155 | 142,665 | 131,575
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 39,952 | 30,290 | 21,435
Other Assets, Noncurrent | 1,559 | 2,021 | 1,306
Latin America [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 115,689 | 131,981 | 116,553
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization | 43,967 | 45,731 | 41,892
Other Assets, Noncurrent | $ 780 | $ 990 | $ 1,230

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