XML 69 R44.htm IDEA: XBRL DOCUMENT v2.4.0.8
Property and Equipment - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Property Plant And Equipment Useful Life And Values [Abstract]      
Depreciation and amortization expense on property and equipment $ 6.8 $ 6.4 $ 6.5