Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Cash flows from operating activities:
Net income	$ 36,426	$ 54,661	$ 11,497
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	48,999	47,057	48,932
Impairment of assets	4,250	0	0
Accretion of deferred financing costs and debt discount	568	621	1,469
Write-off of deferred financing cost and debt discount	0	549	0
Deferred income taxes	15,232	2,185	(1,012)
Share-based compensation and warrant costs	47,936	30,828	20,468
Loss (gain) on disposition of business operations and assets (Note 1)	276	(25,489)	23
Earn-out liabilities	3,892	(215)	(16,362)
Equity in net losses of equity method investments	254	0	0
Gain from convertible debt settlement	(4,275)	0	0
Contingencies	0	(1,518)	2,855
Corporate owned life insurance, net	1,601	770	(420)
Changes in assets and liabilities:
Accounts receivable, net	(1,453)	(7,403)	25,354
Inventories	(5,515)	(1,959)	10,262
Other assets	(5,957)	(7,516)	(657)
Accounts payable	(5,306)	3,101	4,980
Accrued liabilities	2,474	10,582	(12,945)
Deferred revenue	(26)	4,533	2,780
Income taxes payable	(15,718)	2,618	2,611
Other liabilities	(12,173)	4,207	2,241
Net cash provided by operating activities	111,485	117,612	102,076
Cash flows from investing activities:
Proceeds from convertible debt settlement	5,700	0	0
Proceeds from sales of property, plant and equipment	189	48	0
Purchase of property, plant and equipment	(35,461)	(32,920)	(13,026)
Purchase of investments	(18,665)	(13,198)	(14,630)
Acquisitions, net of cash acquired	(17,619)	0	(39,171)
Proceeds from disposition of business operations	0	32,000	0
Proceeds from sale of investments	0	555	0
Net cash used in investing activities	(65,856)	(13,515)	(66,827)
Cash flows from financing activities:
Proceeds from term loans	0	150,000	35,000
Payments of term loans	(15,000)	(80,875)	(30,750)
Proceeds from revolving line of credit	0	97,000	0
Payments of revolving line of credit	0	(181,000)	0
Deferred financing costs	0	(2,110)	0
Payment for employee share-based compensation payroll taxes	(11,671)	(6,562)	(6,513)
Proceeds from exercise of stock options	6,680	5,779	5,807
Repurchase of outstanding common stock	(14,849)	(1,005)	(57,311)
Net cash used in financing activities	(34,840)	(18,773)	(53,767)
Net increase (decrease) in cash and cash equivalents	10,789	85,324	(18,518)
Cash and cash equivalents at beginning of period	297,134	211,810	230,328
Cash and cash equivalents at end of period	307,923	297,134	211,810
Supplemental disclosure of cash flow information
Income taxes paid	31,013	10,503	7,924
Interest paid	6,341	6,492	5,732
Non-cash items
Capital expenditures in accounts payable	3,789	3,373	0
Convertible debt	$ 0	$ 1,425	$ 0