LEASES

We lease office facilities for use in our operations, as well as transportation, computer and other equipment. Most of our leases are non-cancelable operating lease agreements and they expire at various dates through 2025. In addition to rent, the leases generally require us to pay taxes, maintenance, insurance and certain other operating expenses.

Rent expense was approximately $6.9 million in 2017, $6.7 million in 2016, and $7.2 million in 2015, which included rent expense associated with related party lease agreements of $150,000 in 2017, $330,000 in 2016, and $1.8 million in 2015.

Future minimum lease payments under all non-cancelable leases at December 31, 2017 are as follows:



Years Ending December 31,
2018	$	5,428
2019	4,201
2020	3,644
2021	2,366
2022	812
Thereafter	499
Total	$	16,950