The Company leases its office facilities under non-cancelable operating leases that expire at various dates through May 2031. Lease expense for non-cancelable operating leases with free rental periods or scheduled rent increases is recognized on a straight-line basis over the terms of the leases. Improvement reimbursements from landlords of $17.6 million are being amortized on a straight-line basis into lease expense over the terms of the leases. Certain leases contain optional termination dates. The table below only includes payments up to the optional termination date. If the Company were to extend leases beyond the optional termination date, the future commitments would increase by approximately $81.4 million.

Included in the table below are operating lease commitments for leases that have not yet commenced of approximately $66.6 million for facilities with maximum lease terms of approximately 9 years in the United States and 10 years in Germany.

Future minimum payments under all operating and finance lease agreements as of March 31, 2020 are as follows:

	Operating
	(in thousands)
2020	$	32,664
2021		48,993
2022		48,433
2023		48,101
2024		46,892
Thereafter		177,527
Total	$	402,610

The Company leases its office facilities under non-cancelable operating leases. Unused spaces are subleased to third parties. Operating sublease income generated under all operating lease agreements for the three months ended March 31, 2020 and 2019 are as follows:

	Three Months Ended March 31,
	2020		2019
	(in thousands)
Operating sublease income	$	1,354	$	566

As of March 31, 2020, there were no material changes in our vendor commitments under non-cancelable arrangements, as disclosed in the Company’s audited consolidated financial statements for the year ended December 31, 2019 and related notes thereto contained in the Company’s Annual Report on Form 10-K.

Subsequent to March 31, 2020, the Company extended a vendor commitment with an incremental three year contractual obligation of approximately $24 million, payable over the remaining three year term of the amended agreement.

From time to time, the Company may become a party to litigation and subject to claims incident to the ordinary course of business, including intellectual property claims, labor and employment claims, and threatened claims, breach of contract claims, tax, and other matters. The Company currently has no material pending litigation.