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Business Acquisitions (Components of Acquisition-Related Costs, Net) (Detail) (USD $)
3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Business Combinations [Abstract]    
Increase (Decrease) in Other Noncurrent Liabilities $ (7,700,000)  
Transition and integration costs 3,839,000 6,263,000
Professional service fees 3,339,000 9,470,000
Business Combination Acquisition Related Adjustments (4,380,000) 0
Total $ 2,798,000 $ 15,733,000