Minimum Lease Commitments

12 Months Ended

Dec. 31, 2017

The Company occupies certain facilities under operating lease agreements. Gross rental expense related to the Company’s operating leases were $17.7 million in 2017, $17.4 million in 2016, and $15.7 million in 2015. The Company also leases certain owned premises and receives rental income from such lease agreements. Gross rental income related to the Company’s buildings totaled $9.8 million, $8.9 million and $7.7 million, in 2017, 2016 and 2015, respectively. The approximate minimum annual gross rental payments and gross rental receipts under noncancelable agreements for office space with remaining terms in excess of one year as of December 31, 2017, are as follows (in thousands):



	Payments		Receipts
2018	$	12,791	$	4,603
2019	13,011		3,054
2020	13,534		2,327
2021	11,721		1,750
2022	10,856		1,112
2023 and thereafter	104,270		785
Total minimum future amounts	$	166,183	$	13,631