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Variable Interest Entities (Narrative) (Details) - Variable Interest Entity, Primary Beneficiary [Member]
$ in Millions
May. 21, 2014
USD ($)
Jan. 31, 2016
entity
Feb. 01, 2015
entity
Variable Interest Entity [Line Items]      
Number of variable interest entity | entity   1 1
SRV [Member]      
Variable Interest Entity [Line Items]      
Net book value of real property acquired $ 1.0    
Cash payment consideration for real property acquired 1.1    
Gain on disposal of assets 0.1    
SE [Member]      
Variable Interest Entity [Line Items]      
Net book value of real property acquired 3.0    
Total consideration of real property acquired 5.0    
Mortgage note assumed on property acquired 3.4    
Cash payment consideration for real property acquired 1.6    
Gain on disposal of assets $ 2.0