16. 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 $37.1 million, $35.3 million, and $37.0 million in 2017, 2016, and 2015, respectively.

As of December 31, 2017, 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
2018	$	28,284
2019	24,378
2020	21,733
2021	17,577
2022	14,253
Thereafter	73,870
Total	$	180,095