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OTHER - Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year $ 236,317,000 $ 279,493,000
Balance at end of year 200,927,000 276,311,000
Accumulated translation adjustment:    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (34,019,000) (33,727,000)
Other comprehensive income, before reclassifications (4,458,000) 1,306,000
Balance at end of year (38,477,000) (32,421,000)
Accumulated deferred (losses) gains on cash flow hedges:    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year 1,164,000 161,000
Other comprehensive income, before reclassifications (2,996,000) 567,000
Amounts reclassified from accumulated other comprehensive loss 119,000 29,000
Net change in cash flow hedges, net of taxes of $(998) and $189 (2,877,000) 596,000
Balance at end of year (1,713,000) 757,000
Income tax expense (benefit) (998,000) 189,000
Accumulated effect of retirement benefit obligations:    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (1,600,000) (1,050,000)
Amounts reclassified from accumulated other comprehensive loss 20,000 13,000
Balance at end of year (1,580,000) (1,037,000)
Accumulated other comprehensive loss    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of year (34,455,000) (34,616,000)
Balance at end of year $ (41,770,000) $ (32,701,000)