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Commitments and Contingencies (Tables)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]    
Minimum rentals for aggregate lease commitments
The minimum rentals for aggregate lease commitments as of September 30, 2017 are as follows:
Remaining 2017
 
$
4,033

2018
 
11,835

2019
 
7,828

2020
 
4,826

2021
 
2,710

Thereafter
 
4,360

Total
 
$
35,592

The minimum rentals for aggregate lease commitments as of December 31, 2016, were as follows:
2017
$
8,866

2018
5,056

2019
3,334

2020
1,852

2021
948

Thereafter
1,202

Total
$
21,258