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Consolidated Statements of Stockholders’ Equity (USD $)
In Millions, unless otherwise specified
Total
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Noncontrolling Interest [Member]
As Reported [Member]
As Reported [Member]
Common Stock [Member]
As Reported [Member]
Treasury Stock [Member]
As Reported [Member]
Additional Paid-in Capital [Member]
As Reported [Member]
Retained Earnings [Member]
As Reported [Member]
Accumulated Other Comprehensive Income [Member]
As Reported [Member]
Noncontrolling Interest [Member]
Cumulative Prior Period Adjustments [Member]
Cumulative Prior Period Adjustments [Member]
Retained Earnings [Member]
As Restated [Member]
As Restated [Member]
Common Stock [Member]
As Restated [Member]
Treasury Stock [Member]
As Restated [Member]
Additional Paid-in Capital [Member]
As Restated [Member]
Retained Earnings [Member]
As Restated [Member]
Accumulated Other Comprehensive Income [Member]
As Restated [Member]
Noncontrolling Interest [Member]
Balances at beginning of period at Sep. 30, 2010               $ 242.9 $ 0.2 $ (0.1) $ 184.6 $ 59.7 $ (3.1) $ 1.6 $ (1.2) $ (1.2) $ 241.7 $ 0.2 $ (0.1) $ 184.6 $ 58.5 $ (3.1) $ 1.6
Components of comprehensive income                                              
Net income 34.7       34.8   (0.1)                                
Other comprehensive (loss) income (2.9)         (2.9)                                  
Redemption of fund units (0.2)           (0.2)                                
Excercise of stock options 1.4     1.4                                      
Stock-based Compensation 2.3     2.3                                      
Convertible note conversions 16.9     16.9                                      
Balances at end of period at Sep. 30, 2011 293.9 0.2 (0.1) 205.2 93.3 (6.0) 1.3                                
Components of comprehensive income                                              
Net income 12.7       12.8   (0.1)                                
Other comprehensive (loss) income 3.8         3.8                                  
Excercise of stock options 2.1     2.1                                      
Stock-based Compensation 5.9     5.9                                      
Repurchase of stock (4.0)   (4.0)                                        
Disposition or de-consolidation (1.2)           (1.2)                                
Balances at end of period at Sep. 30, 2012 313.2 0.2 (4.1) 213.2 106.1 (2.2) 0                                
Components of comprehensive income                                              
Net income 19.3       19.3                                    
Other comprehensive (loss) income (4.2)         (4.2)                                  
Excercise of stock options 1.5     1.5                                      
Stock-based Compensation 9.3     9.3                                      
Repurchase of stock (3.9)   (3.7) (0.2)                                      
Stock held in escrow for business combination 0.2     0.2                                      
Balances at end of period at Sep. 30, 2013 $ 335.4 $ 0.2 $ (7.8) $ 224.0 $ 125.4 $ (6.4) $ 0