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Operating Leases
 12 Months Ended
Dec. 31, 2018
Leases [Abstract]  
Operating Leases
Operating Leases

The Company enters into operating leases primarily for office space, office equipment and transportation vehicles. Minimum rents as defined in the Company’s lease agreements including rent escalations, rent holidays and rental concessions are recognized on the straight-line basis over the noncancelable lease term. Payments made to or on behalf of the Company for leasehold improvement incentives are considered reductions in rental expense and are amortized on a straight-line basis over the noncancelable lease term. Rental expense under noncancelable operating leases was approximately $10.5 million, $10.9 million, and $10.9 million for the years ended December 31, 2018, 2017 and 2016, respectively. The Company received sublease rental income related to real estate leased to third-parties totaling $0.3 million during each of the years ended December 31, 2018, 2017 and 2016, respectively.
Future minimum lease payments are as follows:
 
 
2019
 
2020
 
2021
 
2022
 
2023
 
Thereafter
 
Total
 
(in thousands)
Minimum lease payments
$
12,633

 
$
10,638

 
$
9,258

 
$
8,866

 
$
3,514

 
$
—

 
$
44,909

Minimum sublease rentals
(124
)
 
—

 
—

 
—

 
—

 
—

 
(124
)
 
$
12,509

 
$
10,638

 
$
9,258

 
$
8,866

 
$
3,514

 
$
—

 
$
44,785