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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statement of Comprehensive Income [Abstract]        
Tax (benefit) provision of unrealized loss on interest rate swap $ 1,542 $ 3,373 $ 1,308 $ 10,058
Tax provision of reclassification adjustment $ 1,193 $ 1,285 $ (2,554) $ (2,553)