Condensed Consolidated Cash Flow Statements (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014
Cash flows from operating activities:
Net income	$ 16,524	$ 58,456
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	113,141	74,382
Share-based compensation	13,814	14,236
Income from equity method investment	(1,459)	(3,240)
Tax benefit related to share-based compensation	(5,064)	(4,939)
Changes in operating assets and liabilities, net of the effects of currency exchange rate changes and acquired businesses:
Receivables	(6,532)	(44,583)
Inventories	7,979	4,188
Accounts payable	(55,973)	(7,613)
Accrued liabilities	29,354	(24,414)
Accrued taxes	(23,884)	(13,818)
Other assets	3,394	8,856
Other liabilities	687	3,255
Net cash provided by operating activities	91,981	64,766
Cash flows from investing activities:
Cash used to acquire businesses, net of cash acquired	(695,345)	(313,065)
Capital expenditures	(39,106)	(31,057)
Proceeds from disposal of tangible assets	145	1,773
Proceeds from (payments for) disposal of business	3,527	(956)
Net cash used for investing activities	(730,779)	(343,305)
Cash flows from financing activities:
Borrowings under credit arrangements	200,000	200,000
Tax benefit related to share-based compensation	5,064	4,939
Debt issuance costs paid	(643)	(6,572)
Payments under borrowing arrangements	(1,250)	(1,250)
Cash dividends paid	(6,386)	(6,540)
Proceeds (payments) from exercise of stock options, net of withholding tax payments	(11,517)	(7,996)
Payments under share repurchase program	(39,053)	(62,197)
Net cash provided by financing activities	146,215	120,384
Effect of foreign currency exchange rate changes on cash and cash equivalents	(6,682)	(6,047)
Decrease in cash and cash equivalents	(499,265)	(164,202)
Cash and cash equivalents, beginning of period	741,162	613,304
Cash and cash equivalents, end of period	$ 241,897	$ 449,102