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Leases (Tables)
12 Months Ended
Dec. 31, 2012
Leases [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Year
Amount
2013
$
13,051

2014
12,960

2015
12,825

2016
12,784

2017
12,756

Thereafter
51,218

 
$
115,594