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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Condensed Consolidated Statements of Comprehensive Income [Abstract]        
Unrealized gains (losses) on change in fair value of interest rate swap contracts, net $ (33) $ 263 $ 61 $ 263
Reclassification adjustment for losses currently in net income, net $ 49 $ 11 $ 51 $ 11