CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Accounts receivable, allowances for doubtful accounts	$ 9,091	$ 8,529
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	560,000	560,000
Common stock, shares issued	322,892	319,365
Common stock, shares outstanding	319,141	315,614
Treasury stock, shares	3,751	3,751