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Share-Based Compensation Plan (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Feb. 10, 2016
Jan. 06, 2016
Jul. 27, 2015
Feb. 11, 2015
Feb. 04, 2014
Dec. 13, 2013
Jan. 30, 2013
Feb. 08, 2012
Sep. 30, 2016
Restricted Stock [Member]                  
Summary of restricted share activity                  
Unvested shares, Beginning balance                 124,617
Unvested shares, Granted                 68,535
Vested, shares                 (52,452)
Forfeited, shares                 (4,809)
Unvested shares, Ending balance                 135,891
Unvested weighted average grant date fair value, beginning balance (in usd per share)                 $ 35.46
Granted, weighted average grant date fair value (in usd per share)                 23.87
Vested, weighted average grant date fair value (in usd per share)                 32.79
Forfeited, weighted average grant date fair value (in usd per share)                 30.66
Unvested weighted average grant date fair value, ending balance (in usd per share)                 $ 30.82
Performance Shares [Member] | February 2012 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted               72,056  
Performance Shares [Member] | February 2012 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award               30.00%  
Grant Date Fair Value by Component ($ in millions)               $ 0.7  
Volatility               33.00%  
Interest Rate               0.34%  
Dividend Yield               2.20%  
Performance Shares [Member] | February 2012 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award               30.00%  
Grant Date Fair Value by Component ($ in millions)               $ 0.6  
Volatility               33.00%  
Interest Rate               0.34%  
Dividend Yield               2.20%  
Performance Shares [Member] | February 2012 [Member] | EBITDA Comparison [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award               40.00%  
Grant Date Fair Value by Component ($ in millions)               $ 0.7  
Volatility               33.00%  
Interest Rate               0.34%  
Dividend Yield               2.20%  
Performance Shares [Member] | January 2013 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted             72,118    
Performance Shares [Member] | January 2013 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award             30.00%    
Grant Date Fair Value by Component ($ in millions)             $ 0.7    
Volatility             31.00%    
Interest Rate             0.41%    
Dividend Yield             2.20%    
Performance Shares [Member] | January 2013 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award             30.00%    
Grant Date Fair Value by Component ($ in millions)             $ 0.5    
Volatility             31.00%    
Interest Rate             0.41%    
Dividend Yield             2.20%    
Performance Shares [Member] | January 2013 [Member] | EBITDA Comparison [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award             40.00%    
Grant Date Fair Value by Component ($ in millions)             $ 0.7    
Volatility             31.00%    
Interest Rate             0.41%    
Dividend Yield             2.20%    
Performance Shares [Member] | December 2013 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted           252,088      
Vested, shares   (25,134)              
Performance Shares [Member] | December 2013 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award           50.00%      
Grant Date Fair Value by Component ($ in millions)           $ 4.7      
Volatility           29.00%      
Dividend Yield           2.40%      
Performance Shares [Member] | December 2013 [Member] | Relative TSR [Member] | Minimum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Interest Rate           0.34%      
Performance Shares [Member] | December 2013 [Member] | Relative TSR [Member] | Maximum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Interest Rate           2.25%      
Performance Shares [Member] | December 2013 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award           50.00%      
Grant Date Fair Value by Component ($ in millions)           $ 2.9      
Volatility           29.00%      
Dividend Yield           2.40%      
Performance Shares [Member] | December 2013 [Member] | Absolute TSR [Member] | Minimum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Interest Rate           0.34%      
Performance Shares [Member] | December 2013 [Member] | Absolute TSR [Member] | Maximum [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Interest Rate           2.25%      
Performance Shares [Member] | February 2014 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted         66,483        
Performance Shares [Member] | February 2014 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award         30.00%        
Grant Date Fair Value by Component ($ in millions)         $ 0.7        
Volatility         29.00%        
Interest Rate         0.62%        
Dividend Yield         2.40%        
Performance Shares [Member] | February 2014 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award         30.00%        
Grant Date Fair Value by Component ($ in millions)         $ 0.5        
Volatility         29.00%        
Interest Rate         0.62%        
Dividend Yield         2.40%        
Performance Shares [Member] | February 2014 [Member] | EBITDA Comparison [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award         40.00%        
Grant Date Fair Value by Component ($ in millions)         $ 0.8        
Volatility         29.00%        
Interest Rate         0.62%        
Dividend Yield         2.40%        
Performance Shares [Member] | February 2015 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted       44,962          
Performance Shares [Member] | February 2015 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award       30.00%          
Grant Date Fair Value by Component ($ in millions)       $ 0.9          
Volatility       22.00%          
Interest Rate       1.02%          
Dividend Yield       2.50%          
Performance Shares [Member] | February 2015 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award       40.00%          
Grant Date Fair Value by Component ($ in millions)       $ 0.7          
Volatility       22.00%          
Interest Rate       1.02%          
Dividend Yield       2.50%          
Performance Shares [Member] | February 2015 [Member] | EBITDA Comparison [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award       30.00%          
Grant Date Fair Value by Component ($ in millions)       $ 0.7          
Volatility       22.00%          
Interest Rate       1.02%          
Dividend Yield       2.50%          
Performance Shares [Member] | July 2015 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted     771            
Performance Shares [Member] | July 2015 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award     30.00%            
Grant Date Fair Value by Component ($ in millions) [1]     $ 0.0            
Volatility     22.00%            
Interest Rate     0.68%            
Dividend Yield     2.50%            
Performance Shares [Member] | July 2015 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award     40.00%            
Grant Date Fair Value by Component ($ in millions) [1]     $ 0.0            
Volatility     22.00%            
Interest Rate     0.68%            
Dividend Yield     2.50%            
Performance Shares [Member] | July 2015 [Member] | EBITDA Comparison [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award     30.00%            
Grant Date Fair Value by Component ($ in millions) [1]     $ 0.0            
Volatility     22.00%            
Interest Rate     0.68%            
Dividend Yield     2.50%            
Performance Shares [Member] | February 2016 [Member]                  
Summary of restricted share activity                  
Unvested shares, Granted 100,919                
Performance Shares [Member] | February 2016 [Member] | Relative TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award 70.00%                
Grant Date Fair Value by Component ($ in millions) $ 1.6                
Volatility 25.00%                
Interest Rate 0.71%                
Dividend Yield 3.00%                
Performance Shares [Member] | February 2016 [Member] | Absolute TSR [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award 15.00%                
Grant Date Fair Value by Component ($ in millions) $ 0.2                
Volatility 25.00%                
Interest Rate 0.71%                
Dividend Yield 3.00%                
Performance Shares [Member] | February 2016 [Member] | EBITDA Comparison [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                  
Percentage of Total Award 15.00%                
Grant Date Fair Value by Component ($ in millions) $ 0.4                
Volatility 25.00%                
Interest Rate 0.71%                
Dividend Yield 3.00%                
[1] Amounts round to zero.