Leases

The Company operates certain administrative, manufacturing, warehouse and testing facilities and equipment under lease arrangements that are accounted for as operating leases. Total rental expense was $22.8 million, $15.1 million and $14.4 million for 2018, 2017 and 2016, respectively.

Future minimum operating lease payments at December 31, 2018 were as follows (in thousands):



2019	$	20,416
2020	16,195
2021	13,702
2022	10,330
2023	5,345
Thereafter	7,988
Total operating lease payments	$	73,976