Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) (Details)

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STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Beginning balance $ 798,467 $ 786,939 $ 835,368 $ 844,312 $ 786,939 $ 844,312
Total other comprehensive income (loss) 12,866 10,127 (44,412) (7,308) 22,993 (51,720)
Foreign exchange rate impact 14,637   (48,063)   26,382 (61,278)
Ending balance 812,954 798,467 793,387 835,368 812,954 793,387
Currency Translation Adjustments            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Beginning balance (33,605) (45,350)     (45,350)  
Other comprehensive income (loss) 13,479 10,634        
Reclassified from accumulated other comprehensive loss 0 0        
Total other comprehensive income (loss) 13,479 10,634        
Foreign exchange rate impact 1,158 1,111        
Ending balance (18,968) (33,605)     (18,968)  
Pension Liability Adjustments            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Beginning balance (41,201) (40,090)     (40,090)  
Other comprehensive income (loss) 0 0        
Reclassified from accumulated other comprehensive loss 0 0        
Total other comprehensive income (loss) 0 0        
Foreign exchange rate impact (1,158) (1,111)        
Ending balance (42,359) (41,201)     (42,359)  
Unrealized gain (loss) on cash flow hedges            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Beginning balance 876 1,383     1,383  
Other comprehensive income (loss) (1,064) (1,097)        
Reclassified from accumulated other comprehensive loss 451 590        
Total other comprehensive income (loss) (613) (507)        
Foreign exchange rate impact 0 0        
Ending balance 263 876     263  
Total            
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]            
Beginning balance (73,930) (84,057) (23,450) (16,142) (84,057) (16,142)
Other comprehensive income (loss) 12,415 9,537        
Reclassified from accumulated other comprehensive loss 451 590        
Total other comprehensive income (loss) 12,866 10,127 (44,412) (7,308)    
Foreign exchange rate impact 0 0        
Ending balance $ (61,064) $ (73,930) $ (67,862) $ (23,450) $ (61,064) $ (67,862)