Significant Accounting Policies - Deferred Financing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2011
Deferred Financing Costs
Unamortized Debt Issuance Expense	$ 18,113	$ 15,276
ABL facility
Deferred Financing Costs
Unamortized Debt Issuance Expense	23,700	21,800
Adjustments for New Accounting Pronouncement | Senior notes
Deferred Financing Costs
Unamortized Debt Issuance Expense	$ 23,700	$ 21,800
Sally Holdings, LLC | ABL facility
Deferred Financing Costs
Debt Instrument, Term	5 years	5 years	5 years
Other assets | ABL facility
Deferred Financing Costs
Unamortized Debt Issuance Expense	$ 1,600	$ 2,400