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Leases

3 Months Ended

Mar. 31, 2021

Our leases primarily relate to office facilities that have remaining terms of up to 9.7 years, some of which include one or more options to renew with renewal terms of up to 5 years and some of which include options to terminate the leases within the next 6.5 years. All of our leases are classified as operating leases.

The components of lease expense were as follows:


	Three Months Ended March 31,
	2021		2020
	(in thousands)
Operating lease cost	$	3,766	$	3,371
Short-term lease costs	165		290
Variable lease costs	1,463		922
Total lease costs	$	5,394	$	4,583

Supplemental balance sheet information related to the operating leases was as follows:


	As of March 31, 2021		As of December 31, 2020
Weighted average remaining lease term (in years) - operating leases	7.7		7.9
Weighted average discount rate - operating leases	7.7	%	7.7	%

Supplemental cash flow information related to leases was as follows:


	Three Months Ended March 31,
	2021		2020
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities	$	4,147	$	3,836
ROU assets obtained in exchange for new lease obligations	$	152	$	3,990

Maturities of operating lease liabilities as of March 31, 2021 were as follows (in thousands):


2021 (for the remaining nine months)	$	11,022
2022	13,880
2023	14,167
2024	13,461
2025	12,543
2026 and thereafter	41,983
Total lease payments	$	107,056
Less: imputed interest	(24,329)
Total	$	82,727