Leases

Rental expense amounted to $5.0 million, $5.6 million and $5.1 million for the years ended December 31, 2015, 2014 and 2013, respectively, and was incurred primarily for facility leases. Future annual minimum rental commitments as of December 31, 2015 are as follows (in thousands):



Fiscal Years
2016	$	4,316
2017	3,652
2018	2,274
2019	2,266
2020	1,266
Thereafter	2,407
Total	$	16,181