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Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 20, 2019	Apr. 21, 2018
Non-cash financing activities:
Recognition of finance lease liabilities		$ 281
Non-cash investing activities:
Capital expenditures included in accounts payable	$ 3,466	3,581
Finance lease asset additions		281
Other supplemental cash flow information:
Cash paid for interest	$ 11,718	$ 8,571

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Non-cash financing activities.

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Non cash financing activities recognition of finance lease liabilities.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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