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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]        
Tax benefit (provision) of unrealized loss on interest rate swap $ (1,082) $ 2,306 $ 2,825 $ 3,818
Tax provision of reclassification adjustment $ 1,188 $ 1,058 $ 2,368 $ 2,102