LEASES

We lease some of our transportation equipment, office space, warehouse space, operating locations, and machinery and equipment. Certain facility storage tanks being constructed are leased pursuant to a ten year term, which is classified as a capital lease. Capitalized costs pursuant to a capital lease are depreciated over the term of the lease. The office, warehouse, and operating location leases, which vary from one to thirty-five year terms that expire at various dates through 2034, with some leases having renewal clauses of various periods, are classified as operating leases. Transportation equipment leases expire at various dates through 2024 and are also classified as operating leases. The office, warehouse, and operating location leases, and machinery and equipment leases generally require us to pay all maintenance and insurance costs.

Our corporate headquarters facility located in The Woodlands, Texas, was sold on December 31, 2012, pursuant to a sale and leaseback transaction. Pursuant to the transaction, we sold the building, parking garage, and land to an unaffiliated third party for a sale price of $43.8 million, before transaction costs and other deductions. As a condition to the consummation of the purchase and sale of the facility, the parties entered into a lease agreement for the facility having an initial lease term of 15 years, which is classified as an operating lease. Under the terms of the lease agreement, we have the ability to extend the lease for five successive five year periods at base rental rates to be determined at the time of each extension. We are responsible for the payment of all related taxes, utilities, insurance, and certain maintenance and improvement costs. Pursuant to sale and leaseback accounting, approximately $5.0 million in deferral of the gain on the sale of the facility remains at December 31, 2018, to be recognized on a straight line basis over the initial lease term.

Future minimum lease payments by year and in the aggregate, under non-cancelable capital and operating leases with terms in excess of one year, and including the headquarters facility lease discussed above, consist of the following at December 31, 2018:



	Capital Lease		Operating Leases
	(In Thousands)
2019	$	188	$	18,466
2020	35		15,947
2021	27		10,456
2022	—		8,410
2023	—		7,441
After 2024	—		27,715
Total minimum lease payments	$	250	$	88,435

Rental expense for all operating leases was $40.9 million, $27.1 million, and $24.8 million for the years ended December 31, 2018, 2017, and 2016, respectively. At December 31, 2018, future minimum rental receipts under a non-cancelable sublease totaled $6.4 million.