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Accumulated Other Comprehensive Income ("AOCI") (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning Balance $ 416,218 $ 398,449 $ 416,156 $ 358,624
Amounts reclassified from AOCI:        
Other comprehensive income (loss), net of tax 7,572 (6,845) (4,786) (444)
Ending Balance 428,987 399,828 428,987 399,828
Unrecognized Benefit Cost        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning Balance (4,300) (4,314) (4,478) (4,492)
Amounts reclassified from AOCI:        
Amortization of defined benefit pension actuarial gain [1] 89 89 267 267
Other comprehensive income (loss), net of tax 89 89 267 267
Ending Balance (4,211) (4,225) (4,211) (4,225)
Cumulative Translation Adjustment        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning Balance (68,364) (59,272) (55,828) (65,495)
Other comprehensive income before reclassifications:        
Foreign currency translation adjustment 7,483 (6,934) (5,053) (711)
Amounts reclassified from AOCI:        
Other comprehensive income (loss), net of tax 7,483 (6,934) (5,053) (711)
Ending Balance (60,881) (66,206) (60,881) (66,206)
Total        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning Balance (72,664) (63,586) (60,306) (69,987)
Other comprehensive income before reclassifications:        
Foreign currency translation adjustment 7,483 (6,934) (5,053) (711)
Amounts reclassified from AOCI:        
Amortization of defined benefit pension actuarial gain [1] 89 89 267 267
Other comprehensive income (loss), net of tax 7,572 (6,845) (4,786) (444)
Ending Balance $ (65,092) $ (70,431) $ (65,092) $ (70,431)
[1] This AOCI component is included in the computation of net periodic pension expense as noted in Note 6 – Pension Plans