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Income taxes (Tables)
6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense Income taxes recognized during the six months ended June 30, 2021 and June 30, 2020, comprise:
Three Months EndedSix Months Ended
June 30, 2021June 30, 2020June 30, 2021June 30, 2020
(in thousands)(in thousands)
Provision for income taxes (excluding restructuring)$14,133 $8,671 $30,281 $21,261 
Tax impact of restructuring— (2,261)— (2,261)
Provision for income taxes $14,133 $6,410 $30,281 $19,000