Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Consolidated Balance Sheets
Preferred stock, authorized shares	20	20
Preferred stock, issued shares	2	3
Preferred stock, outstanding shares	2	3
Preferred stock, par value (in dollars per share)
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	96,016,358	107,041,003
Common stock, outstanding shares	96,016,358	107,041,003