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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2011
Significant Non Cash Investing Activities [Abstract]  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
The following table sets forth the cash paid for interest and taxes for the years ended December 31, 2011, 2010 and 2009 (dollars in thousands): 
 
 
2011
 
2010
 
2009
Interest paid, net
 
$
39,221

 
$
23,175

 
$
26,812

Income taxes
 
$
19,585

 
$
14,639

 
$
9,161