Accumulated Other Comprehensive Income/( Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 758,179	$ 693,156
Gains recognized during the period	12,607	(7,962)
Reclassification to net income	3,040	(1,834)
Income tax effects	(2,991)	964
Ending balance	795,222	700,341
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(144,143)	(89,474)
Ending balance	(131,487)	(98,306)
Foreign currency translation gain/(loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(133,139)	(95,437)
Gains recognized during the period	5,313	(7,445)
Reclassification to net income	0	0
Income tax effects	(1,138)	499
Ending balance	(128,964)	(102,383)
Unrealized gain/(loss) on cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(11,303)	8,420
Gains recognized during the period	7,294	(517)
Reclassification to net income	3,065	(1,989)
Income tax effects	(1,834)	512
Ending balance	(2,778)	6,426
Retirement benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	299	(2,457)
Gains recognized during the period	0	0
Reclassification to net income	(25)	155
Income tax effects	(19)	(47)
Ending balance	$ 255	$ (2,349)