Leases

Minimum future obligations under all non-cancelable operating leases as of December 31, 2017, are as follows:



	Operating Leases
2018	$	3,631
2019	2,887
2020	1,722
2021	996
2022	954
Thereafter	11,161
Total minimum lease obligations	$	21,351

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



	Years Ended December 31,
	2017		2016		2015
Rent expense	$	4,762	$	5,694	$	3,550

Operating leases include a variety of properties around the world. These properties are used as manufacturing facilities, distribution centers and sales offices. Lease expirations range from 2018 to 2033 with breaking periods specified in the lease agreements. Sublease income was $445 in 2017. Future sublease income is $500 in 2018, $487 in 2019, and $1,404 thereafter. Some of our operating leases include renewal options and escalation clauses.

In the fourth quarter of 2012, one of our foreign locations entered into a sale-leaseback transaction. As a result of this transaction, a deferred gain of approximately $4,500 was being amortized over the 6 year expected lease term. During 2015, we terminated the lease and recognized the remaining unamortized deferred gain into income. A gain of $2,108 was included in the Consolidated Statements of Earnings for the year ended December 31, 2015.