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Leases (Tables)
 9 Months Ended
Sep. 30, 2021
Leases [Abstract]  
Components of Lease Cost
The following table summarizes the components of lease expense for the three and nine months ended September 30, 2021 (in thousands):
Three Months EndedNine Months Ended
September 30,September 30,
2021202020212020
Operating lease cost$735 $1,011 $2,537 $3,423 
Short-term lease cost— 6 12 19 
Variable lease cost207 227 754 779 
Sublease income(84)(84)(252)(252)
    Total lease cost$858 $1,160 $3,051 $3,969 
Lease Assets and Liabilities
The following table summarizes the presentation in our condensed consolidated balance sheets of our operating leases (in thousands):
September 30, 2021December 31, 2020
Assets:
Operating lease right-of-use assets$8,005 $8,541 
Liabilities:
Operating lease liabilities$3,482 $3,587 
Long-term operating lease liabilities9,721 10,774 
Total operating lease liabilities$13,203 $14,361 
Weighted average remaining lease term (years)6.687.28
Weighted average discount rate3.4 %3.6 %
Lease Liability Maturity
Maturities of lease liabilities were as follows (in thousands):
Years ending December 31,
2021 (excluding the nine months ended September 30, 2021)$1,015 
20223,203 
20232,125 
20241,426 
20251,350 
Thereafter5,625 
    Total lease payments14,744 
Less interest(1,541)
    Present value of operating lease liabilities$13,203