Leases

The Company leases office space and equipment at its various locations. Many of the leases contain renewal options with varying terms and conditions. Management expects that in the normal course of business, expiring leases will be renewed or, upon making a decision to relocate, replaced by leases for new locations. Operating lease terms range from three to ten years. Rent expense includes insurance, maintenance, and other costs as required by the lease. Total rental expense was $47.6 million, $25.1 million and $20.8 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Future minimum rental commitments under non-cancelable operating leases are as follows (amounts in thousands):



Year	Total
2019	$	35,473
2020	24,663
2021	17,815
2022	10,795
2023	6,302
Thereafter	12,883
	$	107,931