Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019
Cash flows from operating activities:
Net income	$ 35,121	$ 40,408
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,561	13,854
Amortization	14,124	11,959
Impairment of trade name	8,000
Non-cash portion of restructuring costs and charges	2,442
Provision for allowance for doubtful accounts	1,057	1,659
Stock-based compensation	4,369	3,246
Amortization of deferred financing costs, debt discount and premium	925	1,303
Gains on sales of assets	(125)	(3)
Change in operating assets and liabilities (net of effects of acquisition):
Accounts receivable	(20,532)	(2,682)
Inventories	(9,060)	(2,900)
Contract assets, net, prepaid expenses, other current and other assets	(9,867)	(7,720)
Accounts payable, accrued and other liabilities	21,406	(4,852)
Net cash provided by operating activities	65,421	54,272
Cash flows from investing activities:
Purchases of property, plant and equipment	(15,378)	(20,252)
Business acquisition	(90,368)
Proceeds from sales of assets	651	43
Net cash used in investing activities	(105,095)	(20,209)
Cash flows from financing activities:
Proceeds from issuance of senior notes	53,188
Payments of long-term debt	(10,000)	(163)
Payments of financing costs	(1,266)
Purchases of treasury stock under Board of Director approved plan		(5,550)
Purchases of common stock relating to tax withholdings on employee equity awards	(815)	(505)
Proceeds from exercise of stock options	549	1,262
Proceeds from issuance of common stock under employee stock purchase plan (ESPP)	119	46
Net cash provided by (used in) financing activities	41,775	(4,910)
Net increase in cash and cash equivalents	2,101	29,153
Cash and cash equivalents at beginning of period	97,243	52,650
Cash and cash equivalents at end of period	99,344	81,803
Non-cash activity:
Establish right-of-use asset	17,917	31,257
Establish operating lease liability	(17,917)	(33,686)
Property, plant and equipment additions in accounts payable	$ 326	$ 289