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Selected Account Information - Components of Selling, General and Administrative Expenses (Details) - USD ($)
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Taxes and permits $ 8,089,000 $ 8,031,000 $ 8,222,000
Advertising and marketing 5,374,000 5,610,000 5,578,000
Supplies 4,815,000 4,726,000 4,023,000
Legal and professional 4,383,000 4,581,000 3,416,000
Insurance 3,575,000 3,364,000 3,994,000
Rent 3,278,000 4,526,000 4,804,000
Utilities 2,871,000 2,999,000 2,684,000
Charge cards fees 2,252,000 2,176,000 1,790,000
Repairs and maintenance 2,088,000 1,916,000 1,719,000
Security 2,042,000 1,905,000 1,641,000
Other 4,208,000 3,764,000 3,118,000
Selling, general and administrative expenses $ 43,075,000 $ 43,598,000 $ 40,989,000