Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017
OPERATING ACTIVITIES:
Net income	$ 65,000	$ 40,326
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,911	7,325
Stock-based compensation	5,649	6,600
Deferred taxes and uncertain tax positions	(12,258)	(7,135)
Change in fair value of contingent consideration	0	(150)
Changes in operating assets and liabilities:
Accounts receivable	(24,760)	(6,531)
Inventory	(20,403)	(19,844)
Income taxes payable	(1,328)	3,791
Prepaids and other assets	80	(2,981)
Accounts payable	35,717	10,128
Accrued expenses	2,144	(9,498)
Net cash provided by operating activities	60,752	22,031
INVESTING ACTIVITIES:
Purchases of property and equipment	(20,412)	(10,141)
Purchase of intangible assets	0	(84)
Net cash used in investing activities	(20,412)	(10,225)
FINANCING ACTIVITIES:
Payments on line of credit	(35,585)	0
Payment of contingent consideration liability	0	(5,382)
Repayment of debt	(3,750)	(2,812)
Repurchases from stock compensation program, net	(4,041)	(2,854)
Net cash used in financing activities	(43,376)	(11,048)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(79)	725
CHANGE IN CASH AND CASH EQUIVALENTS	(3,115)	1,483
CASH AND CASH EQUIVALENTS—Beginning of period	35,947	35,280
CASH AND CASH EQUIVALENTS—End of period	32,832	36,763
Cash paid during the period for:
Income taxes	17,664	11,946
Interest	$ 2,223	$ 1,485