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ACQUISITIONS (Details) - Summary of Goodwill and Intangible Asset Classifications (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Jun. 30, 2014
Sep. 30, 2013
Jun. 30, 2014
Customer relationships [Member]
Jun. 30, 2014
Recent Acquirees [Member]
Jun. 30, 2014
Recent Acquirees [Member]
Customer relationships [Member]
Jun. 30, 2014
Recent Acquirees [Member]
Tradenames [Member]
May 21, 2014
Cyclone [Member]
May 21, 2014
Cyclone [Member]
Customer relationships [Member]
May 21, 2014
Cyclone [Member]
Tradenames [Member]
Dec. 31, 2013
Northcote [Member]
Dec. 31, 2013
Northcote [Member]
Customer relationships [Member]
Dec. 31, 2013
Northcote [Member]
Tradenames [Member]
Business Acquisition [Line Items]                        
Goodwill $ 381,315 $ 357,730   $ 21,689     $ 10,072     $ 11,617    
Indefinite life intangible assets       3,560   3,560 1,874   1,874 1,686   1,686
Amortizable intangible assets       15,867 15,867   9,844 9,844   6,023 6,023  
Amortization Period (Years)     25 years                  
Total Goodwill and Intangibles       $ 41,116     $ 21,790     $ 19,326