Condensed Consolidated Cash Flow Statements (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
Cash flows from operating activities:
Net income	$ 1,955	$ 24,609
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	75,654	48,433
Share-based compensation	9,891	9,524
Income from equity method investment	(1,111)	(2,210)
Tax benefit related to share-based compensation	(5,288)	(4,894)
Changes in operating assets and liabilities, net of the effects of currency exchange rate changes and acquired businesses:
Receivables	(6,250)	(33,762)
Inventories	(11,837)	7,605
Accounts payable	(43,689)	(4,584)
Accrued liabilities	(4,363)	(32,271)
Accrued taxes	(10,214)	(13,226)
Other assets	(625)	7,212
Other liabilities	923	4,119
Net cash provided by operating activities	5,046	10,555
Cash flows from investing activities:
Cash used to acquire businesses, net of cash acquired	(695,345)	(311,467)
Capital expenditures	(27,224)	(20,963)
Payments related to the disposal of a business		(956)
Proceeds from disposal of tangible assets	80	13
Net cash used for investing activities	(722,489)	(333,373)
Cash flows from financing activities:
Borrowings under credit arrangements	200,000	200,000
Tax benefit related to share-based compensation	5,288	4,894
Payments under share repurchase program		(31,197)
Payments under borrowing arrangements	(625)	(625)
Debt issuance costs paid	(643)	(5,702)
Cash dividends paid	(4,235)	(4,358)
Proceeds (payments) from exercise of stock options, net of withholding tax payments	(11,439)	(7,741)
Net cash provided by financing activities	188,346	155,271
Effect of foreign currency exchange rate changes on cash and cash equivalents	(3,646)	(792)
Decrease in cash and cash equivalents	(532,743)	(168,339)
Cash and cash equivalents, beginning of period	741,162	613,304
Cash and cash equivalents, end of period	$ 208,419	$ 444,965