The Company leases facilities and certain equipment under noncancelable operating leases that expire at various dates through February 2031. Under the terms of the facilities leases, the Company is required to pay its proportionate share of property taxes, insurance and normal maintenance costs.

In 2015, the Company entered into a master lease agreement giving the Company the ability to lease vehicles under operating leases with initial terms of 36 months from the date of delivery. In 2018, the lease agreement was terminated and a new master lease agreement was entered into with a new vendor giving the Company the ability to lease vehicles under operating leases with initial terms ranging from 12 to 50 months from the date of delivery.

The Company leases facilities and certain equipment under noncancelable operating leases with remaining lease terms of 2.0 year to 9.4 years, some of which include options to extend the lease for up to two five-year terms. These optional periods were not considered in the determination of the right-of-use asset or the lease liability as the Company did not consider it reasonably certain that it would exercise such options.

The operating lease costs were as follows (in thousands):


	Years Ended December 31,
	2021		2020		2019
Operating lease cost	$	8,874	$	6,917	$	5,155

Supplemental cash flow information related to the Company’s leases were as follows (in thousands):


	Years Ended December 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	5,303	$	4,480
Right-of-use assets obtained in exchange for operating lease obligations:		17,272		42,039

The balance sheet classification of the Company’s lease liabilities was as follows (in thousands):


	December 31, 2021		December 31, 2020
Operating lease liabilities
Current portion included in accrued liabilities	$	8,304	$	5,087
Operating lease liabilities		56,126		44,460
Total operating lease liabilities	$	64,430	$	49,547

Maturities of lease liabilities were as follows (in thousands):


	Operating Leases
Years ending December 31,
2022	$	8,520
2023		8,390
2024		8,275
2025		8,355
2026		7,719
Thereafter		36,556
Total lease payments		77,815
Less:
Imputed interest		(13,385	)
Total operating lease liabilities	$	64,430

Operating lease liabilities are based on the net present value of the remaining lease payments over the remaining lease term. In determining the present value of lease payments, the Company uses its incremental borrowing rate based on the information available at the lease commencement date. As of December 31, 2021 and 2020, the weighted average remaining lease term was 9.0 years and 9.4 years, respectively, and the weighted average discount rate used to determine the operating lease liability was 4.3% and 4.7%, respectively.

In the fourth quarter of 2018, the Company entered into an agreement to lease the 4th and 5th floors of corporate office space in San Diego, California with total minimum lease payments of $50.4 million over an initial term of 10 years and 9 months. In February 2020, the Company entered into the first amendment to the lease agreement to lease the 2nd floor of corporate office space in San Diego, California with total minimum lease payments of $25.3 million over an initial term of approximately 10 years and 7 months. In March 2020, the Company entered into the second amendment to the lease agreement which increased the total minimum lease payments of the original corporate office space to $51.4 million. In the third quarter of 2020, the lease for the 4th and 5th floors of corporate office space commenced and the Company capitalized a right of use asset and related lease liability of $40.3 million. In the first quarter of 2021, the lease for the 2nd floor of corporate office space commenced and the Company capitalized a right of use asset and related lease liability of $19.2 million. In connection with this lease and the amendment, the Company established a letter of credit for $3.1 million, which has automatic annual extensions and is fully secured by restricted cash.