The Company enters into leases for real estate and equipment. Real estate leases are for our corporate office space and laboratories around the world. Real estate leases have remaining lease terms of less than 1 year to 20 years. Many of the Company’s leases include options to extend the leases on a month to month basis or for set periods for up to 20 years. Many leases also include options to terminate the leases within 1 year or per other contractual terms.

The components of lease expense as of March 31, 2019 were as follows (in thousands):

Supplemental cash flow information for the three months ended March 31, 2019 related to the leases was as follows (in thousands):

	Three Months Ended March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	2,216

Right-of-use assets obtained in exchange for lease obligations:
Operating leases		3,952

Supplemental balance sheet information as of March 31, 2019 related to the leases was as follows (in thousands):

	As of March 31, 2019

Operating lease right-of-use assets	$	53,627

Other current liabilities	$	9,340
Operating lease liabilities		46,238
Total operating lease liabilities	$	55,578

Weighted Average Remaining Lease Term (years)
Operating leases	6.5
Weighted Average Discount Rate
Operating leases		5.9%

Lease payments due related to lease liabilities as of March 31, 2019 were as follows (in thousands):

	Operating Leases
Remainder of 2019	$	8,878
2020		12,220
2021		11,494
2022		8,999
2023		6,772
Later years		19,172
Total lease payments		67,535
Less: imputed interest		(11,957	)
Total	$	55,578

As of March 31, 2019, we have an additional operating lease related to a corporate office under construction, which has not yet commenced, with future payments of $124.0 million. This operating lease will commence between fiscal year 2019 and fiscal year 2020 with an initial lease term of 20 years and a renewal option for two 10-year terms at prevailing market rates.

Rental expense under operating leases totaled $2.4 million for the three months ended March 31, 2018.

Future minimum rental payments for lease obligations with initial terms in excess of one year as of December 31, 2018 are as follows (in thousands):

			Non-Related		Total
	Related Party		Parties Operating		Operating
	Operating Lease		Leases		Leases
2019	$	1,987	$	6,186	$	8,173
2020		6,843		6,617		13,460
2021		6,964		5,873		12,837
2022		6,757		3,694		10,451
2023		5,229		3,257		8,486
Thereafter		103,870		5,752		109,622
Total minimum lease payments	$	131,650	$	31,379	$	163,029

Minimum annual payments required in conjunction with the Deemed landlord liabilities are as follows (in thousands):

	Related Party				Total
	Minimum Lease		Less:		Principal
	Payments		Interest		Amounts Due
2019	$	3,918	$	1,818	$	2,100
2020		3,988		1,662		2,326
2021		4,039		1,490		2,549
2022		4,092		1,301		2,791
2023		4,145		1,095		3,050
Thereafter		15,697		1,929		13,768
Total	$	35,879	$	9,295	$	26,584