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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Components of Lease Cost
The components of lease costs were as follows for the years ended December 31, 2019, 2020, and 2021 (in thousands)
 201920202021
Lease Cost:
Operating lease cost(1)
$35,335 $28,337 $53,957 
Short-term lease cost885 534 1,768 
Sublease income(2,696)(2,240)(2,255)
Total lease costs$33,524 $26,631 $53,470 
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(1)During the years ended December 31, 2019, 2020 and 2021, operating lease cost includes $6.0 million, $0.8 million, and $18.9 million of right-of-use lease asset impairment charges, respectively, related to redundant leased space that was vacated during the year.
The following table provides a summary of the Company's average lease term and discount rate as of December 31, 2020 and 2021:
As of December 31, 2020As of December 31, 2021
Weighted average remaining lease term (years)5.67.8
Weighted average discount rate4.37 %4.01 %

Supplemental information related to the Company's leases for the years ended December 31, 2019, 2020, and 2021 (in thousands):
Year ended December 31, 2019Year ended December 31, 2020Year ended December 31, 2021
Cash paid for amounts included in the measurement of lease liabilities$32,883 $32,510 $43,021 
Right-of-use assets obtained in exchange for operating lease liabilities$4,431 $12,763 $79,953 
Maturities of Lease Liabilities
Maturities of lease liabilities (in thousands):
Year Ending December 31,
2022$34,086 
202331,502 
202429,059 
202525,752 
202623,048 
Thereafter80,322 
Total lease payments223,769 
Less: interest(33,943)
Present value of lease liabilities$189,826