Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2012	Sep. 30, 2011
Consolidated Balance Sheets
Preferred stock, authorized shares	20	20
Preferred stock, issued shares	3	3
Preferred stock, outstanding shares	3	3
Preferred stock, liquidation preference value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized shares	300,000,000	300,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued shares	107,041,003	113,248,337
Common stock, outstanding shares	107,041,003	113,248,337