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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2011
Leases, Operating [Abstract]  
Operating Leases of Lessee Disclosure [Table Text Block]
2012
$
28,837

2013
22,647

2014
16,968

2015
13,446

2016
9,881

Thereafter
10,456

Total
$
102,235