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Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Summary of Components of Lease Expense and Supplemental Cash Flow Information Related to Leases
The components of lease expense were as follows:
Year Ended December 31,
20202019
(in thousands)
Operating lease costs$14,881 $11,299 
Short-term lease costs1,033 1,140 
Variable lease costs4,870 3,388 
Total lease costs$20,784 $15,827 
Supplemental cash flow information related to leases was as follows:
As of December 31,
20202019
(in thousands)
Cash paid for amounts included in the measurement of lease liabilities$16,159 $11,720 
ROU assets obtained in exchange for new lease obligations$15,838 $65,873 
Summary of Supplemental Balance Sheet Information Related to Operating Leases
Supplemental balance sheet information related to the operating leases was as follows:
As of December 31,
20202019
(in thousands, except lease term and discount rate)
Operating ROU assets$67,178 $60,984 
Operating lease liabilities, current portion$9,612 $7,179 
Operating lease liabilities, non-current portion75,737 72,294 
Total operating lease liabilities$85,349 $79,473 
Weighted average remaining lease terms (in years) - operating leases7.98.7
Weighted average discount rate - operating leases7.7 %7.6 %
Summary of Maturities of Operating Lease Liabilities and Future Minimum Payments under Non-cancellable Leases
Maturities of operating lease liabilities as of December 31, 2020 were as follows (in thousands):
2021$15,035 
202213,887 
202314,177 
202413,464 
202512,552 
Thereafter41,958 
Total lease payments$111,073 
Less: imputed interest(25,724)
Total$85,349