We lease certain assets under operating leases, which at December 31, 2019 primarily consist of real estate leases for 31 of our 236 service center locations and automotive leases for private passenger vehicles. Certain operating leases provide for renewal options, which can vary by lease and are typically offered at their fair rental value. We have not made any residual value guarantees related to our operating leases; therefore, we have no corresponding liability recorded on our Balance Sheets.

The right-of-use assets and corresponding lease liabilities on our Balance Sheet represent payments over the lease term, which includes renewal options for certain real estate leases that we are likely to exercise. These renewal options begin in 2020 and continue through 2033, and range from one to ten years in length. Short-term leases, which have an initial term of 12 months or less, are not included in our right-of-use assets.

Of our total lease liabilities, $10.4 million is classified as current and is presented within “Other accrued liabilities,” and $56.1 million is classified as non-current and is presented within “Other non-current liabilities,” on our Balance Sheet as of December 31, 2019. Our right-of-use assets totaled $65.3 million and are presented within “Other assets,” which is classified as long-term, on our Balance Sheet as of December 31, 2019.

Future lease payments for assets under operating leases, as well as a reconciliation to our total lease liabilities as of December 30, 2019, are as follows:

(In thousands)	Lease Payments (a)
2020	$	12,839
2021		10,255
2022		7,906
2023		6,377
2024		4,828
Thereafter		43,008
Total lease payments	$	85,213
Less: Imputed interest		(18,728	)
Total lease liabilities	$	66,485

(a) Lease payments include lease extensions that are reasonably certain to be exercised and exclude $44.8 million in lease payments for leases that have been executed but not yet commenced.

The weighted average lease term for our operating leases was 9.4 years as of December 31, 2019. The discount rate used in the calculation of our right-of-use assets and corresponding lease liabilities was determined based on the stated rate within each contract when available, or our collateralized borrowing rate from lending institutions. The weighted average discount rate for our operating leases was 4.0% as of December 31, 2019.

Cash paid for amounts included in the measurement of our operating leases was $14.3 million for the year ended December 31, 2019. Aggregate expense under operating leases was $14.7 million, $12.6 million and $14.1 million for 2019, 2018 and 2017, respectively. Certain operating leases include rent escalation provisions, which we recognize as expense on a straight-line basis. Lease expense is presented within “Operating supplies and expenses” or “General supplies and expenses,” depending on the nature of the use of the leased asset. During the year ended December 31, 2019, we added $8.3 million of right-of-use assets in exchange for new operating lease liabilities.