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Commitments And Contingencies (Tables)
6 Months Ended
Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Lease Payments Under Operating Leases
Future minimum lease payments under operating leases were:
 
As of
June 30, 2018
 
(in thousands)
2018 (remainder of year)
$
24,955

2019
36,870

2020
29,706

2021
24,013

2022
17,404

Thereafter
39,581

     Total minimum lease payments
$
172,529

Operating Lease Rental Expense
Rent expense under operating leases was: 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
 
(in thousands)
Minimum rentals (1)
$
17,565

 
$
20,403

 
$
35,844

 
$
41,188

Contingent rentals
5,535

 
5,562

 
7,695

 
7,822

Less: Sublease rentals
(33
)
 
(52
)
 
(73
)
 
(89
)
Total rent expense
$
23,067

 
$
25,913

 
$
43,466

 
$
48,921

(1) Minimum rentals include all lease payments as well as fixed and variable common area maintenance, parking, and storage fees, which were approximately $2.4 million and $2.8 million for the three months ended June 30, 2018 and 2017, respectively, and $4.8 million and $5.7 million for the six months ended June 30, 2018 and 2017, respectively.