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Leases (Tables)
12 Months Ended
Dec. 31, 2015
Leases [Abstract]  
Future Minimum Rental Payments for Operating Leases [Table Text Block]
As of December 31, 2015, our minimum lease payment requirements for noncancelable operating leases with remaining terms of more than one year are as follows (in thousands):

2016
 
$
13,556

2017
 
13,403

2018
 
13,043

2019
 
12,570

2020
 
11,551

Thereafter
 
44,156

Total
 
$
108,279