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Commitments And Contingencies Operating Lease Commitments (Tables)
 12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Operating lease commitments for years ending December 31 are as follows (in thousands): 
2013
$
15,194

2014
14,547

2015
12,761

2016
11,538

2017
9,714

Thereafter
11,283

 
$
75,037