17. LEASES

The Corporation conducts a portion of its operations from leased facilities, which include manufacturing and service facilities, administrative offices, and warehouses. In addition, the Corporation leases vehicles, machinery, and office equipment under operating leases. The leases expire at various dates and may include renewals and escalations. Rental expenses for all operating leases amounted to $38.4 million, $37.1 million, and $35.3 million in 2018, 2017, and 2016, respectively.

As of December 31, 2018, the approximate future minimum rental commitments under operating leases that have initial or remaining non-cancelable lease terms in excess of one year are as follows:



(In thousands)	Rental Commitments
2019	$	29,562
2020	28,514
2021	24,501
2022	19,996
2023	19,778
Thereafter	93,974
Total	$	216,325