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Lease Commitments
12 Months Ended
Dec. 31, 2017
Leases, Operating [Abstract]  
Lease Commitments
Lease Commitments

The Company leases office facilities, equipment and vehicles under operating leases expiring on various dates through 2025. Certain office leases contain renewal options. The following is a schedule by calendar year of future minimum lease payments under operating leases that have remaining terms as of December 31, 2017:
Period/Year
 
Operating Leases
 
 
(in thousands)
2018
 
$
2,482

2019
 
1,968

2020
 
1,489

2021
 
734

2022
 
735

Thereafter
 
1,710

Total minimum lease payments
 
$
9,118



Total expense for all operating leases for the years ended December 31, 2017, 2016 and 2015 was as follows:
 
Year Ended December 31,
 
2017
 
2016
 
2015
 
(in thousands)
Operating lease expense
$
3,833

 
$
2,615

 
$
2,003