We have entered into various non-cancellable operating lease agreements for certain of our offices and data centers with lease periods expiring primarily between fiscal years 2022 and 2029. Certain of these arrangements have free or escalating rent payment provisions and optional renewal or termination clauses. Our operating leases typically include variable lease payments, which are primarily comprised of common area maintenance and utility charges for our offices and power and network connections for our data centers, that are determined based on actual consumption. Our operating lease agreements do not contain any residual value guarantees, covenants, or other restrictions.

We also entered into various finance lease arrangements to obtain servers and related equipment for our data center operations. These agreements are primarily for four years and certain of these arrangements have optional renewal or termination clauses. The leases are secured by the underlying leased servers and related equipment.

We sublease certain floors of our Redwood City, San Francisco, and London offices. Our current subleases have total lease terms ranging from 11 to 96 months that will expire at various dates by fiscal year 2025.

The components of lease cost, which were included in operating expenses in our consolidated statements of operations, were as follows (in thousands):

	Year End January 31,
	2021			2020
Finance lease cost:
Amortization of finance lease right-of-use assets	$	54,630		$	43,448
Interest on finance lease liabilities		5,753			4,483
Operating lease cost, gross		54,243			48,870
Variable lease cost, gross		9,288			11,862
Sublease income		(10,969	)		(11,504	)
Total lease cost (1)	$	112,945		$	97,159

Supplemental cash flow information related to leases was as follows (in thousands):

	Year End January 31,
	2021		2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows for operating leases	$	59,478	$	48,675
Operating cash flows for finance leases		6,358		4,052
Financing cash flows for finance leases		60,020		38,542
Right-of-use assets obtained in exchange of lease obligations (1)
Operating leases	$	39,267	$	233,255
Finance leases		31,282		103,420

Supplemental information related to the remaining lease term and discount rate was as follows:

	January 31,
	2021			2020
Weighted-average remaining lease term (in years)
Operating leases		5.77			6.67
Finance leases		2.35			2.93

Weighted-average discount rate
Operating leases		5.27	%		5.40	%
Finance leases		4.44	%		4.56	%

As of January 31, 2021, maturities of our operating and finance lease liabilities, which do not include short-term leases and variable lease payments, are as follows (in thousands):

Fiscal years ending January 31:	Operating Leases (1)			Finance Leases
2022	$	59,002		$	53,788
2023		49,576			41,770
2024		48,093			19,357
2025		32,435			1,555
2026		28,348			—
Thereafter		63,562			—
Total lease payments	$	281,016		$	116,470
Less: imputed interest		(40,714	)		(6,231	)
Present value of total lease liabilities	$	240,302		$	110,239

We did not have any operating leases or finance leases that have not yet commenced as of January 31, 2021.

We establish assets and liabilities for the present value of estimated future costs to return certain of our leased facilities to their original condition. Such assets are depreciated over the lease period into operating expense, and the recorded liabilities are accreted to the future value of the estimated restoration costs. The present value of our estimated asset retirement obligation for our headquarters facility, which is recorded in other long-term liabilities, was $3.1 million and $2.8 million as of January 31, 2021 and 2020, respectively. The accretion expense, which was included in operating expenses in our consolidated statements of operations, was not material for all periods presented.