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Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 9,509	$ 11,586
Retirement benefit reserves	8	9
Foreign currency translation adjustments	3,583	(1,765)
Comprehensive income	$ 13,100	$ 9,830

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