Accumulated Other Comprehensive Income/( Loss) - Summary of Accumulated Other Comprehensive Income/( Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 719,172	$ 670,001	$ 618,319
Gains / (losses) recognized during the year	(7,029)	9,724
Reclassification to net income	(8,555)	(407)
Income tax effects	2,228	591
Loss on net investment hedges	(1,134)	0	0
Ending balance	693,156	719,172	670,001
Foreign currency translation loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(86,185)	(87,591)
Gains / (losses) recognized during the year	(11,134)	(540)
Reclassification to net income	0	0
Income tax effects	3,016	1,946
Loss on net investment hedges	(1,134)
Ending balance	(95,437)	(86,185)	(87,591)
Unrealized gain on cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	13,799	4,098
Gains / (losses) recognized during the year	4,663	12,665
Reclassification to net income	(9,264)	(801)
Income tax effects	(778)	(2,163)
Loss on net investment hedges	0
Ending balance	8,420	13,799	4,098
Retirement benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,598)	(1,399)
Gains / (losses) recognized during the year	(558)	(2,401)
Reclassification to net income	709	394
Income tax effects	(10)	808
Loss on net investment hedges	0
Ending balance	(2,457)	(2,598)	(1,399)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(74,984)	(84,892)	(83,467)
Ending balance	$ (89,474)	$ (74,984)	$ (84,892)