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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - 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]        
Net income $ 55,824 $ 41,881 $ 102,072 $ 81,679
Other comprehensive income (loss), net of tax:        
Foreign currency translation adjustments, net of $0 tax in each of the three and six months ended June 30, 2022 and 2021 (754) (40) (1,023) (58)
Unrealized loss on marketable securities, net of $0 tax in each of the three and six months ended June 30, 2022 and 2021 (1,160) (331) (5,341) (911)
Amortization of defined benefit pension items, net of tax of $0 and $3 in the three and six months ended June 30, 2022, respectively, and $6 and $141 in the three and six months ended June 30, 2021, respectively 23 52 41 (23)
Total other comprehensive loss (1,891) (319) (6,323) (992)
TOTAL COMPREHENSIVE INCOME $ 53,933 $ 41,562 $ 95,749 $ 80,687