(4) Leases

We lease certain facilities under noncancelable operating leases with terms expiring between 2017 and 2036. The leases have renewal options ranging from 5 to 20 years, which are exercisable at our option. In addition, certain leases contain escalation clauses based on a fixed percentage increase and provisions for contingent rentals based on a percentage of gross revenues, as defined. Total rental expense amounted to $22.9 million, $21.1 million, and $18.7 million, including contingent rentals of approximately $3.6 million, $3.6 million, and $3.9 million for the fiscal years ended December 27, 2016, December 29, 2015 and December 30, 2014, respectively.

Future minimum lease payments under noncancelable operating leases include renewal option periods for certain leases when such option periods are included for purposes of calculating straight-line rents. At December 27, 2016, future minimum rentals for each of the next five years and thereafter, and in total, are as follows:



	(in thousands)
2017	$	20,771
2018		21,431
2019		21,535
2020		20,751
2021		20,271
Thereafter		225,440
Total minimum lease payments	$	330,199