Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Current assets:
Allowance, accounts receivable	$ 7,741	$ 8,872
Stockholders' equity:
Preferred stock, par value	$ 0.003	$ 0.003
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.001455	$ 0.001455
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	72,960,000	72,960,000
Treasury stock, shares	6,657,000	4,883,000
Treasury stock held for deferred compensation, shares	215,000	232,000