Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 4,611	$ 3,259
Preferred stock, par value (dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (dollars per share)	$ 0	$ 0
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	74,415,000	78,090,000
Common stock, shares outstanding	74,415,000	78,090,000