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Property and Equipment - Estimated Life of Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Sep. 30, 2012
Property Plant And Equipment Estimated Useful Lives [Line Items]    
Property, Plant and Equipment, Gross $ 158,086 $ 154,662
Accumulated depreciation and amortization (57,747) (55,866)
Property and equipment, net 100,339 98,796
Land [Member]
    
Property Plant And Equipment Estimated Useful Lives [Line Items]    
Property, Plant and Equipment, Gross 40,939 41,050
Building and Improvements [Member]
    
Property Plant And Equipment Estimated Useful Lives [Line Items]    
Property, Plant and Equipment, Gross 81,212 79,540
Machinery and Equipment [Member]
    
Property Plant And Equipment Estimated Useful Lives [Line Items]    
Property, Plant and Equipment, Gross 26,334 25,407
Furniture and Fixtures [Member]
    
Property Plant And Equipment Estimated Useful Lives [Line Items]    
Property, Plant and Equipment, Gross 4,656 3,904
Vehicles [Member]
    
Property Plant And Equipment Estimated Useful Lives [Line Items]    
Property, Plant and Equipment, Gross $ 4,945 $ 4,761