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Supplemental Cash Flow Information (Supplemental Cash Flow Information) (Details) (USD $)
In Thousands
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Supplemental Cash Flow Information [Abstract]    
Income taxes paid (refunded), net$ (47)$ 1,774$ 6,914$ 5,345
Interest paid$ 320$ 369$ 969$ 1,032