CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Cash flows from operating activities:
Consolidated net income	$ 12,837	$ 34,274
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	9,067	6,482
Provision for inventory excess and obsolescence	810	549
Share-based compensation	2,044	1,469
Deferred income taxes	235	(1,607)
Earnings from equity-method investment		(104)
Gain on acquisition of business		(26,409)
Inventory acquisition fair value adjustment		1,035
Other	94	509
Changes in assets and liabilities which (used)/provided cash, excluding effects from businesses acquired:
Accounts receivable	5,421	(3,690)
Inventories	(7,423)	(4,414)
Prepaid income taxes, income taxes receivable, prepaid expenses and other current assets	3,918	(462)
Accounts payable, income taxes payable, accrued expenses and other current liabilities	(6,357)	4,851
Other non-current assets and liabilities	(237)	277
Cash provided by operating activities	20,409	12,760
Cash flows from investing activities:
Purchases of property, plant and equipment	(2,933)	(1,760)
Acquisition of businesses, net of cash acquired		(34,896)
Other investing activities	52
Cash used in investing activities	(2,881)	(36,656)
Cash flows from financing activities:
Borrowings under revolving credit facility		42,000
Repayments of long-term debt and revolving credit facility	(5,300)	(1,875)
Payments of contingent considerations		(2,398)
Repurchase of common stock		(370)
Payments of withholding taxes from stock-based awards	(2,804)	(1,669)
Capital lease payments	(142)	(215)
Other financing activities	(74)
Cash provided by (used in) financing activities	(8,320)	35,473
Effect of exchange rates on cash and cash equivalents	1,862	329
Increase in cash and cash equivalents	11,070	11,906
Cash and cash equivalents, beginning of period	100,057	68,108
Cash and cash equivalents, end of period	111,127	80,014
Supplemental disclosure of cash flow information:
Cash paid for interest	2,142	781
Cash paid for income taxes	3,896	1,819
Income tax refunds received	$ 507	$ 23