XML 53 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-based Compensation Plans (Narrative) (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2018
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
shares
Jun. 30, 2018
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
shares
Allocated Share-based Compensation Expense | $ $ 1.2 $ 0.4 $ 5.3 $ 5.1
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ $ 6.6   $ 6.6  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 213,599 165,186 245,033 208,868
Phantom Share Units (PSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share | $ / shares $ 11.72   $ 11.72  
Share-based compensation liability | $ $ 1.7   $ 1.7  
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period     146,061 263,410
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     171,288  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years  
Share-based compensation, units awarded but not yet granted 178,105   178,105  
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 3,333   342,038  
Minimum [Member] | Performance Shares [Member]        
Performance Factor     0  
Maximum [Member] | Performance Shares [Member]        
Performance Factor     2