Consolidiated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Consolidated Balance Sheets
Accounts receivable, reserve (in dollars)	$ 4,597	$ 4,795
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	160,000,000	160,000,000
Common stock, shares issued	110,508,605	108,738,577
Common stock, shares outstanding	108,232,284	106,716,970
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Treasury stock, shares	2,276,321	2,021,607