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OTHER - Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year $ 230,136 $ 236,317
Balance at end of year 233,406 200,927
Accumulated translation adjustment:    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (35,846) (34,019)
Other comprehensive income, before reclassifications 1,829 (4,458)
Balance at end of year (34,017) (38,477)
Accumulated deferred losses on cash flow hedges:    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (1,125) 1,164
Other comprehensive income, before reclassifications (554) (2,996)
Amounts reclassified from accumulated other comprehensive loss 381 119
Other comprehensive income (loss), net of taxes (173) (2,877)
Balance at end of year (1,298) (1,713)
Income tax expense (benefit) (19) (998)
Accumulated effect of retirement benefit obligations:    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (2,201) (1,600)
Amounts reclassified from accumulated other comprehensive loss 27 20
Balance at end of year (2,174) (1,580)
Accumulated other comprehensive  loss    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (39,172) (34,455)
Balance at end of year $ (37,489) $ (41,770)