The Company has operating leases for facilities and equipment which have remaining terms ranging from 1 to 12 years. The leases may include options to extend the lease periods for up to 5 years at rates approximating market rates and/or options to terminate the leases within 1 year. The leases may include a residual value guarantee or a responsibility to return the property to its original state of use. A limited number of leases contain provisions that provide for rental increases based on consumer price indices. The change in rent expense resulting from changes in these indices are included within variable rent.

	September 30, 2021			December 31, 2020
Real estate facilities	$	156,020		$	157,010
Office equipment		2,117			1,864
Other		690			580
		158,827			159,454
Amortization of right-of-use assets		(54,904	)		(32,322	)
Total operating lease right-of-use assets	$	103,923		$	127,132

Rent expense is recognized on a straight-line basis over the lease term. Rent expense consists of the following:

	Three Months Ended				Nine Months Ended
	September 30, 2021		September 30, 2020		September 30, 2021		September 30, 2020
Operating lease costs	$	8,557	$	9,605	$	26,004	$	28,375
Short-term lease costs		91		276		327		1,149
Variable lease costs		13		1		32		2
Total rent expense	$	8,661	$	9,882	$	26,363	$	29,526

Future minimum lease payments under non-cancellable leases as of September 30, 2021 were as follows:

September 30, 2022	$	38,473
September 30, 2023		24,552
September 30, 2024		18,476
September 30, 2025		13,622
September 30, 2026		12,606
Thereafter		27,346
Total future minimum lease payments		135,075
Less: Interest		(12,125	)
Total operating lease liabilities	$	122,950

Operating lease liabilities - current	$	35,418
Operating lease liabilities - non-current		87,532
Total operating lease liabilities	$	122,950

	September 30, 2021			September 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	18,743		$	29,248
Right-of-use assets obtained in exchange for operating lease liabilities	$	969		$	29,581
Weighted-average remaining lease term - operating leases		5.7			6.0
Weighted-average discount rate - operating leases		3.3	%		3.4	%

At September 30, 2021, the Company had an additional operating lease that had not yet commenced with a potential lease liability of $113.3 million. The operating lease has a term of approximately 18 years and is now anticipated to commence on January 1, 2022 (previously March 1, 2022) when the Company takes possession of the property upon completion of buildouts.