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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Leases, Operating [Abstract]  
Lessee, Operating Lease, Disclosure [Table Text Block]
2018
$
33,939

2019
25,292

2020
17,132

2021
11,729

2022
9,745

Thereafter
11,289

Total
$
109,126