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Operating Leases
 12 Months Ended
Dec. 31, 2016
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 non-cancellable 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 non-cancellable lease term. Rental expense under non-cancellable operating leases was approximately $10.9 million, $10.5 million and $10.4 million for the years ended December 31, 2016, 2015 and 2014, respectively. The Company received sublease rental income related to real estate leased to third-parties totaling $0.3 million, $0.3 million and $0.4 million during the years ended December 31, 2016, 2015 and 2014.
Future minimum lease payments are as follows:
 

2017
 
2018
 
2019
 
2020
 
2021
 
Thereafter
 
Total
 
(in thousands)
Minimum lease payments
$
12,171

 
$
10,962

 
$
10,122

 
$
8,995

 
$
7,814

 
$
11,114

 
$
61,178

Minimum sublease rentals
(366
)
 
(372
)
 
(124
)
 
—

 
—

 
—

 
(862
)

$
11,805

 
$
10,590

 
$
9,998

 
$
8,995

 
$
7,814

 
$
11,114

 
$
60,316