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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Purchase Obligations and Non-Cancellable Operating Leases
Future minimum lease payments under purchase obligations and non-cancellable operating leases are as follows (in thousands):
 
 
Purchase Obligations
 
Operating
Leases
2017
 
$
54,751

 
$
7,018

2018
 

 
6,235

2019
 

 
5,646

2020
 

 
4,529

2021
 

 
3,760

Thereafter
 

 
6,967

Total long-term obligations
 
$
54,751

 
$
34,155