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Consolidated Condensed Statements Of Stockholders' Equity And Other Comprehensive Income (Parenthetical) (USD $)
In Thousands
6 Months Ended
Jun. 30, 2011
Consolidated Condensed Statements Of Stockholders' Equity And Other Comprehensive Income  
Net reduction of unrealized gain/increase in unrealized loss on fair value of interest rate swap agreements, tax $ 1,218