CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013
Accounts receivable, allowances for doubtful accounts	$ 8,634	$ 8,529
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	560,000	560,000
Common stock, shares issued	321,035	319,365
Common stock, shares outstanding	317,284	315,614
Treasury stock, shares	3,751	3,751