CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts,receivable current	$ 5,173	$ 3,385
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares outstanding	64,892,000	65,437,000
Common stock, shares issued	64,892,000	65,437,000