Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 Promotional program incentive allowances	Sep. 30, 2013 Promotional program incentive allowances	Sep. 30, 2012 Promotional program incentive allowances	Sep. 30, 2011 Promotional program incentive allowances	Sep. 30, 2014 Allowance for sales returns	Sep. 30, 2013 Allowance for sales returns	Sep. 30, 2012 Allowance for sales returns	Sep. 30, 2011 Allowance for sales returns	Sep. 30, 2014 Allowance for doubtful accounts	Sep. 30, 2013 Allowance for doubtful accounts	Sep. 30, 2012 Allowance for doubtful accounts	Sep. 30, 2011 Allowance for doubtful accounts
Sales Returns and Other Allowances
Number of past years history in business on which reasonable and reliable estimates of product returns is based		40 years
Reserve information
Total accounts receivable reserves	$ 101,741	$ 101,741	$ 98,848		$ 83,768	$ 82,827	$ 71,845	$ 74,593	$ 15,409	$ 13,549	$ 10,360	$ 10,793	$ 2,564	$ 2,472	$ 5,244	$ 5,376
Accruals for Litigation and Other Contingencies
Litigation and other contingency reserve	0	0
Shipping and Handling Costs
Shipping and handling costs		97,382	92,062	85,784
Amounts billed to customers		20,862	14,050	13,831
Advertising, Promotion and Catalog
Advertising cost amortization period		2 months
Capitalized costs for mail order catalogs	671	671	740
Total mail order catalog expense		9,093	7,713	9,378
Goodwill and Intangible Assets
Impairment adjustments	$ 207,334