Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 30, 2016	Oct. 25, 2015
Cash flows from operating activities:
Net income	$ 46,642	$ 10,250
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairments	35,506	36,534
Accretion of deferred financing costs and debt discount	492	1,054
Deferred income taxes	15,659	4,366
Share-based compensation	21,198	13,398
(Gain) loss on disposition of business operations and assets	(24,988)	23
Earn-out liabilities	(162)	(13,618)
Environmental reserve	(68)	2,855
Changes in assets and liabilities:
Accounts receivable, net	(15,994)	14,577
Inventories	1,302	2,694
Prepaid expenses and other assets	(11,785)	5,975
Accounts payable	6,775	677
Accrued liabilities	8,885	(15,631)
Deferred revenue	3,300	1,033
Income taxes payable and prepaid taxes	(7,875)	2,086
Other liabilities	5,807	1,343
Net cash provided by operating activities	84,694	67,616
Cash flows from investing activities:
Purchase of property, plant and equipment	(13,754)	(10,705)
Acquisitions, net of cash acquired	0	(44,432)
Purchases of other investments	(3,248)	(5,230)
Proceeds from disposition of business operations	32,045	0
Proceeds from sale of equity investments	555	5,261
Net cash provided by (used in) investing activities	15,598	(55,106)
Cash flows from financing activities:
Borrowings under line of credit	0	35,000
Payment for employee share-based compensation payroll taxes	(5,928)	(6,070)
Proceeds from exercises of stock options	1,678	3,965
Repurchase of outstanding common stock	(539)	(57,311)
Payment of long term debt	(9,374)	(26,063)
Net cash used in financing activities	(14,163)	(50,479)
Net increase (decrease) in cash and cash equivalents	86,129	(37,969)
Cash and cash equivalents at beginning of period	211,810	230,328
Cash and cash equivalents at end of period	$ 297,939	$ 192,359