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Supplemental Disclosure Of Cash Flow Information (Schedule Of Supplemental Disclosure Of Cash Flow Information) (Details) (USD $)
In Thousands, unless otherwise specified
7 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2011
May 31, 2010
May 31, 2009
Supplemental Disclosure Of Cash Flow Information [Abstract]        
Interest $ 7,555 $ 13,630 $ 2,302 $ 2,528
Income taxes (refund) paid, net 11,923 (1,013) 10,714 9,786
Deemed distribution from parent for acquisition-related transaction costs $ 0 $ 0 $ 0 $ 6,137