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Derivative Financial Instruments Effectiveness Testing (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2016
Interest rate swap agreements [Member]          
Gain/(loss) reclassified from accumulated other comprehensive income/(loss) into earnings due to ineffectiveness $ 0 $ 0 $ 0 $ 0  
Existing net losses realized and recorded as interest expense 900,000 $ 600,000 2,500,000 $ 1,600,000  
Foreign Exchange Forward [Member]          
Gain/(loss) reclassified from accumulated other comprehensive income/(loss) into earnings due to ineffectiveness $ 0   $ 0    
Scenario, Forecast [Member] | Interest rate swap agreements [Member]          
Existing net losses expected to be realized within the next 12 months         $ 1,900,000