XML 104 R81.htm IDEA: XBRL DOCUMENT v3.5.0.2
Stock-based Compensation Plans (Schedule of Share-based Compensation, Phantom Award Activity) (Details) - Phantom Share Units (PSUs) [Member] - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding, shares 558,878 643,288 608,982  
Outstanding, Weighted average grant date fair value per share $ 9.60 $ 8.49 $ 6.22 $ 4.03
Outstanding, Weighted average remaining contractual term 11 months 9 months 7 days 9 months 7 days 1 year
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 302,875 289,524 304,815  
Granted, Weighted average grant date fair value per share $ 9.84 $ 9.78 $ 8.52  
Vested, shares (270,822) (317,409) (240,739)  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 2.5 $ 3.1 $ 2.1  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (56,905) (56,525) (29,770)  
Canceled, Weighted average grant date fair value per share $ 9.28 $ 8.29 $ 5.29  
Outstanding, shares 534,026 558,878 643,288 608,982