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Leases (Details 2) $ in Thousands	3 Months Ended
	Mar. 28, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows from finance leases	$ 587
Operating cash flows from finance leases	294
Operating cash flows from operating leases	5,213
Right of use assets obtained in exchange for new lease obligations:
Finance lease liabilities	1,566
Operating lease liabilities, including from acquisitions	$ 159,175

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Amount of cash outflow for principal payment on finance lease.

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