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Revolving Credit Facility and Mortgage (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Apr. 01, 2017
USD ($)
Jan. 10, 2018
property
Debt Instrument [Line Items]      
Principal payments on mortgage $ 97,847 $ 27,388  
Revolving Credit Facility      
Debt Instrument [Line Items]      
Long-term line of credit facility 223,300    
Line of credit facility, remaining borrowing capacity $ 70,100    
Sale-leaseback of four distribution centers      
Debt Instrument [Line Items]      
Number of properties in sale-leaseback arrangement | property     4