The Company has operating leases for facilities and equipment which have remaining terms ranging from 1 to 14 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.

Operating leases consisted of the following at September 30, 2020 and December 31, 2019:

	September 30, 2020			December 31, 2019
Real estate facilities	$	160,299		$	162,150
Office equipment		1,898			1,595
Other		496			935
		162,693			164,680
Amortization of right-of-use assets		(24,111	)		(30,715	)
Total operating lease right-of-use assets	$	138,582		$	133,965

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, 2020		September 30, 2019			September 30, 2020		September 30, 2019
Operating lease costs	$	9,605	$	9,256		$	28,375	$	26,762
Short-term lease costs		276		552			1,149		1,555
Variable lease costs		1		(180	)		2		4
Total rent expense	$	9,882	$	9,628		$	29,526	$	28,321

Future minimum lease payments under non-cancellable leases as of September 30, 2020 were as follows:

September 30, 2021	$	38,064
September 30, 2022		39,286
September 30, 2023		24,641
September 29, 2024		18,646
September 29, 2025		13,881
Thereafter		40,376
Total future minimum lease payments		174,894
Less: Interest		(17,339	)
Total operating lease liabilities	$	157,555

Operating lease liabilities - current	$	33,581
Operating lease liabilities - non-current		123,974
Total operating lease liabilities	$	157,555

	September 30, 2020			September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	29,248		$	27,772
Right-of-use assets obtained in exchange for new operating lease liabilities	$	29,581		$	28,763
Weighted-average remaining lease term - operating leases		6.0			5.3
Weighted-average discount rate - operating leases		3.4	%		3.7	%

At September 30, 2020, the Company had an additional operating lease that had not yet commenced with a potential lease liability of $117.4 million. The operating lease with lease a term of 17 years, is anticipated to commence in 2022 when the Company takes possession of the property upon completion of buildouts.