All of the Company’s leases are operating leases, the majority of which are for office space. Operating lease right-of-use (“ROU”) assets and non-current operating lease liabilities are included as individual line items on the Consolidated Balance Sheets, while short-term operating lease liabilities are recorded within accrued expenses and other current liabilities. Leases with an initial term of twelve months or less are not recorded on the Consolidated Balance Sheets and are not material.

	Three Months Ended			Three Months Ended
	March 31, 2020			March 31, 2019
Operating lease cost	$	3,991		$	3,569
Short-term lease cost		81			255
Variable lease cost		1,356			1,234
Sublease income		(61	)		—
Total lease cost	$	5,367		$	5,058

Additional lease information is summarized in the following table (in thousands, except lease term and discount rate):

	Three Months Ended			Three Months Ended
	March 31, 2020			March 31, 2019
Cash paid for amounts included in the measurement of operating lease liabilities	$	2,999		$	3,753
Operating right-of-use assets obtained in exchange for lease obligations	$	1,466		$	12,011
Weighted-average remaining lease term - operating leases (years)		6.3			7.0
Weighted-average discount rate - operating leases		5.1	%		5.1	%

Future minimum lease payments under non-cancellable leases as of March 31, 2020 are as follows (in thousands):

2020 (remainder)	$	11,828
2021		14,022
2022		13,505
2023		12,974
2024		12,619
Thereafter		23,902
Total lease payments		88,850
Less imputed interest		(12,945	)
Present value of lease liabilities	$	75,905

Operating lease right-of-use assets	$	64,220

Short-term operating lease liabilities (1)	$	12,065
Non-current operating lease liabilities		63,840
Total operating lease liabilities	$	75,905

(1)	Included in accrued expenses and other current liabilities on the Consolidated Balance Sheets.

The Company’s leases do not contain residual value guarantees, material restrictions or covenants, and all sublease transactions are not material. The Company incurred $1.4 million of ROU asset impairments during the three months ended March 31, 2020 related to facility leases from the SiriusDecisions, Inc. acquisition and are recorded in acquisition and integration costs in the Consolidated Statements of Operations.

During the three months ended March 31, 2020, the Company entered into several operating leases for office space which do not commence until later in 2020. These operating leases, which aggregated $17.2 million of undiscounted lease payments, have lease terms of up to ten years. Additionally, the Company could receive a variable incentive payment from its landlord to terminate one of its office space leases early. The range of possible incentive payments is zero to $3.5 million, would be received in late 2020 or the first half of 2021, and is dependent on the Company’s ability to exit the existing facility by the proposed early termination dates.