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SEGMENT INFORMATION GEOGRAPHIC INFORMATION (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax $ 1,259,313 $ 1,448,666 $ 1,602,408
Long-Lived Assets 319,854 367,595 384,872
UNITED STATES      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 583,400 672,556 711,887
Long-Lived Assets 103,748 121,022 137,410
Europe [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 343,452 400,059 469,322
Long-Lived Assets 163,265 162,817 165,827
Latin America [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 218,258 254,375 271,374
Long-Lived Assets 38,531 50,358 52,393
Other Countries [Domain]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax 114,203 121,676 149,825
Long-Lived Assets $ 14,310 $ 33,398 $ 29,242