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Lease Maturity (Details) - USD ($) $ in Thousands | Mar. 27, 2019 | Dec. 27, 2018 | Dec. 26, 2018
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Leases Maturity [Abstract] |  |  |
Finance Lease Payments, Remainder of 2019 | $ 6,821 |  |
Finance Lease Payments, 2020 | 8,481 |  |
Finance Lease Payments, 2021 | 7,838 |  |
Finance Lease Payments, 2022 | 7,129 |  |
Finance Lease Payments, 2023 | 6,239 |  |
Finance Lease Payments, Thereafter | 31,693 |  |
Finance Lease Payments, Total Undiscounted Cash Flows | 68,201 |  |
Finance Lease Payments, Interest | 39,275 |  |
Finance Lease, Present Value Lease Liabilities | 28,926 |  |
Finance Lease, Current Lease Liabilities | 3,487 |  | $ 3,410
Finance Lease, Long-term Lease Liabilities | 25,439 |  | 27,181
Operating Lease Payments, Remainder of 2019 | 17,481 |  |
Operating Lease Payments, Liability, 2020 | 20,106 |  |
Operating Lease Payments, Liability, 2021 | 16,948 |  |
Operating Lease Payments, Liability, 2022 | 14,293 |  |
Operating Lease Payments, Liability, 2023 | 11,210 |  |
Operating Lease Payments, Thereafter | 54,010 |  |
Operating Lease Payments, Total Discounted Cash Flows | 134,048 |  |
Operating Lease Payments, Interest | 32,824 |  |
Operating Lease, Present Value of Lease Liabilities | 101,224 | $ 101,300 |
Operating Lease, Current Lease Liabilities | 17,004 |  | 0
Operating Lease, Long-term Lease Liabilities | 84,220 |  | 0
Operating Lease, Payments to be Received, Remainder of 2019 | 16,107 |  |
Operating Lease, Payments to be Received, 2020 | 19,257 |  |
Operating Lease, Payments to be Received, 2021 | 17,351 |  |
Operating Lease, Payments to be Received, 2022 | 15,685 |  |
Operating Lease, Payments to be Received, 2023 | 13,466 |  |
Operating Lease, Payments to be Received, Thereafter | 73,083 |  |
Operating Lease, Payments to be Received, Total Undiscounted Cash Flows | $ 154,949 |  |
Capital Leases, Future Minimum Payments Due, Next Twelve Months |  |  | 9,271
Capital Leases, Future Minimum Payments Due in Two Years |  |  | 8,664
Capital Leases, Future Minimum Payments Due in Three Years |  |  | 8,010
Capital Leases, Future Minimum Payments Due in Four Years |  |  | 7,320
Capital Leases, Future Minimum Payments Due in Five Years |  |  | 6,451
Capital Leases, Future Minimum Payments Due Thereafter |  |  | 33,670
Capital Leases, Future Minimum Payments Due |  |  | 73,386
Capital Leases, Future Minimum Payments, Interest Included in Payments |  |  | 42,795
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments |  |  | 30,591
Operating Leases, Future Minimum Payments Due, Next Twelve Months |  |  | 23,504
Operating Leases, Future Minimum Payments, Due in Two Years |  |  | 20,161
Operating Leases, Future Minimum Payments, Due in Three Years |  |  | 17,316
Operating Leases, Future Minimum Payments, Due in Four Years |  |  | 14,646
Operating Leases, Future Minimum Payments, Due in Five Years |  |  | 11,881
Operating Leases, Future Minimum Payments, Due Thereafter |  |  | 49,004
Operating Leases, Future Minimum Payments Due |  |  | $ 136,512

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- Definition Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition Amount necessary to reduce net minimum lease payments to present value for capital leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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