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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Statement of Comprehensive Income [Abstract]        
Foreign currency translation adjustments, tax $ 0 $ 0 $ 0 $ 0
Unrealized loss on marketable securities, tax 0 0 0 0
Amortization of defined benefit pension items, tax $ 0 $ 6 $ 3 $ 141