Leases

Minimum future obligations under all non-cancelable operating leases as of December 31, 2018, are as follows:



	Operating Leases
2019	$	3,859
2020	3,622
2021	2,587
2022	2,411
2023	2,464
Thereafter	16,086
Total minimum lease obligations	$	31,029

Rent expense for operating leases charged to operations was as follows:



	Years Ended December 31,
	2018		2017		2016
Rent expense	$	5,726	$	4,762	$	5,694

Operating leases include a variety of properties around the world. These properties are used as manufacturing facilities, distribution centers and sales and administrative offices. Lease expirations range from 2018 to 2033 with breaking periods specified in the lease agreements. Sublease income was $455 in 2018. Future sublease income is $444 in 2019, $423 in 2020, and $846 thereafter. Some of our operating leases include renewal options and escalation clauses.