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Leases (Tables)
 6 Months Ended
Jun. 30, 2021
Leases [Abstract]  
Components of Lease Cost The components of lease cost were as follows:
Three Months Ended June 30,Six Months Ended June 30,
(in thousands)2021202020212020
Operating lease cost$11,317 $8,154 $20,415 $15,976 
Short-term lease cost986 391 1,875 1,269 
Variable lease cost742 526 1,431 1,147 
Total lease cost$13,045 $9,071 $23,721 $18,392