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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2012
Leases, Operating [Abstract]  
Operating Leases of Lessee Disclosure [Table Text Block]
2013
$
33,248

2014
26,497

2015
16,875

2016
11,044

2017
6,943

Thereafter
8,103

Total
$
102,710