Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 29, 2018	Jul. 30, 2017
Cash flows from operating activities:
Net income	$ 37,551	$ 24,385
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,540	23,093
Accretion of deferred financing costs and debt discount	269	289
Deferred income taxes	(14,870)	380
Share-based compensation and warrant costs	49,481	28,810
Loss on disposition of business operations and assets	11	424
Earn-out liabilities	(900)	0
Equity in net losses of equity method investments	58	0
Contingencies	0	45
Corporate owned life insurance, net	645	554
Changes in assets and liabilities:
Accounts receivable, net	(20,653)	(9,490)
Inventories	13,020	(9,423)
Other assets	4,190	(1,099)
Accounts payable	2,626	(9,132)
Accrued liabilities	(6,414)	(6,541)
Deferred revenue	(53)	196
Income taxes payable	(1,697)	1,328
Other liabilities	(3,437)	2,177
Net cash provided by operating activities	84,367	45,996
Cash flows from investing activities:
Proceeds from sales of property, plant and equipment	10	6
Purchase of property, plant and equipment	(9,821)	(18,952)
Purchase of investments	(5,595)	(7,462)
Acquisition, net of cash acquired	(7,321)	(17,619)
Proceeds from sale of investments	1,601	0
Net cash used in investing activities	(21,126)	(44,027)
Cash flows from financing activities:
Payments of term loans	(7,500)	(7,500)
Payment for employee share-based compensation payroll taxes	(10,640)	(5,687)
Proceeds from exercise of stock options	8,048	2,332
Repurchase of outstanding common stock	(49,738)	(10,394)
Net cash used in financing activities	(59,830)	(21,249)
Net increase (decrease) in cash and cash equivalents	3,411	(19,280)
Cash and cash equivalents at beginning of period	307,923	297,134
Cash and cash equivalents at end of period	311,334	277,854
Supplemental disclosure of cash flow information
Income taxes paid	2,939	3,078
Interest paid	3,900	3,490
Non-cash items
Capital expenditures in accounts payable	$ 2,314	$ 1,902