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New Markets Tax Credit Transactions (Details)
$ in Millions
12 Months Ended
Dec. 30, 2017
USD ($)
Variable Interest Entity [Line Items]  
Percentage of qualifying investments on tax credits 39.00%
Aggregate principal amount $ 13.7
Percentage of aggregate principal amount, leverage loan 1.00%
Percentage of recapture to the tax credits 100.00%
Compliance period 7 years
Wells Fargo [Member]  
Variable Interest Entity [Line Items]  
Contribution to investment fund $ 6.6