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 June 30, 2020 and December 31, 2019:

	June 30, 2020			December 31, 2019
Real estate facilities	$	182,437		$	162,150
Office equipment		2,458			1,595
Other		935			935
		185,830			164,680
Amortization of right-of-use assets		(46,641	)		(30,715	)
Total operating lease right-of-use assets	$	139,189		$	133,965

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

	Three Months Ended				Six Months Ended
	June 30, 2020		June 30, 2019		June 30, 2020		June 30, 2019
Operating lease costs	$	9,444	$	8,610	$	18,770	$	17,505
Short-term lease costs		442		322		873		1,003
Variable lease costs		1		172		1		184
Total rent expense	$	9,887	$	9,104	$	19,644	$	18,692

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

June 30, 2021	$	37,255
June 30, 2022		38,545
June 30, 2023		28,364
June 29, 2024		18,955
June 29, 2025		12,619
Thereafter		36,327
Total future minimum lease payments		172,065
Less: Interest		(17,116	)
Total operating lease liabilities	$	154,949

Operating lease liabilities - current	$	33,028
Operating lease liabilities - non-current		121,921
Total operating lease liabilities	$	154,949

	June 30, 2020			June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	19,086		$	18,594
Right-of-use assets obtained in exchange for new operating lease liabilities	$	22,721		$	14,896
Weighted-average remaining lease term - operating leases		5.9			5.1
Weighted-average discount rate - operating leases		2.9	%		3.7	%

At June 30, 2020, the Company had additional operating leases that have not yet commenced with a potential lease liability of $129.1 million. Such operating leases are anticipated to commence, where we take possession of the property and commence any required buildout, over the next three years, with lease terms of 10 years to 17 years.