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Net Income Per Common Share (Potentially Dilutive Securities Excluded From Computation Of Net Income Per Share) (Details)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net Income Per Common Share [Abstract]      
Antidilutive convertible preferred shares 16,184 15,819 15,819
Shares issuable under option awards 40 40 40
Unvested stock awards   240 111