Commitments

Leases

We are committed under operating leases primarily for office and data center space and computer equipment through October 2027. Rent expense for office and warehouse space for our regional and global offices for 2017, 2016 and 2015 was $31 million, $29 million and $32 million, respectively. Aggregate minimum future payments under these non-cancelable operating leases are as follows:



(In thousands)	Operating Lease Obligations

2018	$	32,371
2019	28,605
2020	24,012
2021	19,452
2022	12,914
2023 and thereafter	6,463

	$	123,817

Other Obligations

We have purchase commitments with various vendors, and minimum funding commitments under collaboration agreements through 2037. Aggregate future payments under these commitments are as follows:



(In thousands)	Purchase Obligations

2018	$	76,861
2019	47,587
2020	17,250
2021	5,490
2022	4,410
2023 and thereafter	22,504

	$	174,102