CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Cash flows from operating activities--
Net earnings	$ 298,128	$ 284,216	$ 191,610
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	69,774	58,234	54,074
Non-cash share-based compensation	6,237	27,905	15,864
Deferred income taxes	(14,492)	21,363	1,919
Gain (Loss) on Disposition of Assets	(12,042)	0	0
Gain (Loss) on Sale of Assets and Asset Impairment Charges	3,114	0	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	58,000	0	0
Changes in assets and liabilities, net of acquisitions
Accounts receivable, net	26,180	(33,908)	17,112
Inventories, net	(9,744)	(22,246)	7,826
Prepaid expenses and other assets	(34,122)	(11,550)	(5,685)
Accounts payable	(21,631)	(7,730)	(18,036)
Accrued expenses and other liabilities	(64,947)	(22,174)	(15,092)
Net cash provided by operating activities	304,455	294,110	249,592
Cash flows from investing activities--
Additions to property and equipment	(54,493)	(24,817)	(22,362)
Proceeds from Sale of Property Held-for-sale	14,278	0	0
Payments to Acquire Businesses, Net of Cash Acquired	(305,251)	(210,921)	(348,625)
Net cash (used in) investing activities	(345,466)	(235,738)	(370,987)
Proceeds from (Repayments of) Lines of Credit	296,771	(2,482)	145,500
Cash flows from financing activities--
Net (repayments) proceeds under foreign bank loan	(1,062)	(26,821)	(6,058)
Repayments of Notes Payable	(35)	(35)	(262)
Repurchase of treasury stock	(239,838)	(4,418)	(4,836)
Payments of Debt Issuance Costs	0	(6,310)	0
Excess tax benefit related to share-based compensation	0	(1,304)	2,414
Net cash (used in) provided by financing activities	55,836	(41,370)	136,758
Effect of exchange rates on cash and cash equivalents	6,344	(4,045)	(3,780)
Changes in cash and cash equivalents--
Net (decrease) increase in cash and cash equivalents	21,169	12,957	11,583
Cash and cash equivalents at beginning of year	68,485	55,528
Cash and cash equivalents at end of quarter	89,654	68,485	55,528
CVP Systems [Member]
Stock Issued During Period, Value, Acquisitions	$ 13,399	$ 0	$ 0