Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018
Cash flows from operating activities:
Net income	$ 36,259	$ 49,716
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,270	37,332
Impairment of investments	0	30,000
Accretion of deferred financing costs and debt discount	365	399
Deferred income taxes	1,817	(19,001)
Share-based compensation and warrant costs	28,741	60,947
Loss (gain) on disposition of assets	292	(68)
Changes in the fair value of contingent earn-out obligations	(2,313)	(9,419)
Equity in net (gains) losses of equity method investments	(109)	41
Corporate owned life insurance, net	3,358	41
Changes in assets and liabilities:
Accounts receivable, net	17,779	(26,096)
Inventories	(6,429)	10,754
Other assets	(2,663)	1,377
Accounts payable	(8,592)	5,329
Accrued liabilities	(20,023)	(2,538)
Deferred revenue	(1,103)	(488)
Income taxes payable	(2,105)	(1,697)
Other liabilities	(2,183)	(264)
Net cash provided by operating activities	73,361	136,365
Cash flows from investing activities:
Proceeds from sales of property, plant and equipment	329	112
Purchase of property, plant and equipment	(20,409)	(12,928)
Purchase of investments	(9,592)	(6,701)
Acquisition, net of cash acquired	0	(7,265)
Proceeds from sale of investments	0	1,601
Net cash used in investing activities	(29,672)	(25,181)
Cash flows from financing activities:
Payments of term loans	(14,062)	(11,250)
Payments of earn-out	(237)	(8,530)
Payment for employee share-based compensation payroll taxes	(20,514)	(17,802)
Proceeds from exercise of stock options	4,446	10,449
Repurchase of common stock	(42,636)	(79,738)
Net cash used in financing activities	(72,752)	(106,871)
Net (decrease) increase in cash and cash equivalents	(29,063)	4,313
Cash and cash equivalents at beginning of period	312,120	307,923
Cash and cash equivalents at end of period	283,057	312,236
Supplemental disclosure of cash flow information
Interest paid	6,641	5,705
Income taxes paid	8,531	4,042
Non-cash investing and financing activities:
Decrease in accounts payable related to capital expenditures	$ 867	$ 2,178