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Equity Incentive Plan - Valuation Assumptions (Details)
Jun. 01, 2015
Jan. 30, 2015
Jan. 31, 2014
May. 17, 2013
Performance-based Restricted Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Volatility   29.00% 27.00% 35.00%
Dividend Yield   0.00% 0.00% 0.00%
Risk Free Interest Rate   0.84% 0.71% 0.43%
Long Term Incentive Plan Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Volatility 26.00%      
Dividend Yield 4.50%      
Risk Free Interest Rate 0.95%