Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019
Cash flows from operating activities:
Net income	$ 17,799	$ 25,302
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	11,451	9,143
Amortization	9,424	8,030
Impairment of trade name	8,000
Non-cash portion of restructuring costs and charges	2,442
Provision for allowance for doubtful accounts	826	967
Stock-based compensation	2,918	2,276
Amortization of deferred financing costs, debt discount and premium	589	861
Gains on sales of assets	(155)	(19)
Change in operating assets and liabilities (net of effects of acquisition):
Accounts receivable	(15,050)	(2,079)
Inventories	(5,914)	(1,060)
Contract assets, net, prepaid expenses, other current and other assets	(1,080)	(2,758)
Accounts payable, accrued and other liabilities	15,261	3,920
Net cash provided by operating activities	46,511	44,583
Cash flows from investing activities:
Purchases of property, plant and equipment	7,315	12,963
Business acquisition	90,145
Proceeds from sales of assets	284	19
Net cash used in investing activities	(97,176)	(12,944)
Cash flows from financing activities:
Proceeds from issuance of senior notes	53,188
Payments of long-term debt		(154)
Payments of financing costs	(1,266)
Purchases of treasury stock relating to tax withholdings on employee equity awards	(815)	(505)
Proceeds from exercise of stock options	549	840
Proceeds from issuance of common stock under employee stock purchase plan	119	31
Net cash provided by financing activities	51,775	212
Net increase in cash and cash equivalents	1,110	31,851
Cash and cash equivalents at beginning of period	97,243	52,650
Cash and cash equivalents at end of period	98,353	84,501
Non-cash activity:
Establish right-of-use asset	14,838	31,257
Establish operating lease liability	(14,838)	(33,686)
Property, plant and equipment additions in accounts payable	$ 1,690	$ 230