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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Components of lease expense The components of lease expenses consist of following (in thousands):
Year Ended December 31,
Lease Cost202120202019
Operating lease cost 1
$33,241 $27,825 $22,778 
Variable lease cost 2
11,134 1,429 1,899 
Total lease cost $44,375 $29,254 $24,677 
1    Includes expense associated with short term leases of less than 12 months which is not material
2    Includes payments related to agreements with embedded leases that are not otherwise reflected on the balance sheet. These costs are associated with our manufacturing supply arrangements and fluctuate based on factory output and material price changes.
Summary of operating lease terms and discount rates
The following table provides a summary of our operating lease terms and discount rates:
December 31,
Remaining Lease Term and Discount Rate20212020
Weighted average remaining lease term (in years)7.87.4
Weighted average discount rate 3.2 %4.2 %
Schedule of operating lease liabilities
As of December 31, 2021, the future payments related to our operating lease liabilities are as follows (in thousands):
Fiscal Year Ending December 31,Operating Leases
2022$26,035 
202324,620 
202418,284 
202515,517 
202613,113 
Thereafter45,461 
Total lease payments143,030 
Less: Imputed interest(17,655)
Total lease liabilities$125,375