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Investment in Leasing Operations: Risk Concentration (Details) - Total assets - customer | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018
Investment in leasing operations |  |
Number of customers | 0 | 2
Customer One Concentration Risk |  |
Investment in leasing operations |  |
Percentage of concentration risk |  | 24.00%
Customer Two Concentration Risk |  |
Investment in leasing operations |  |
Percentage of concentration risk |  | 11.00%

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