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Leases - Other Information (Details) $ in Thousands	9 Months Ended
	Sep. 26, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ 1,908
Operating cash flows from finance leases	870
Operating cash flows from operating leases	18,140
Right of use assets obtained in exchange for new lease obligations:
Finance lease liabilities	1,716
Operating lease liabilities, including from acquisitions	$ 163,416

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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