Unaudited Consolidated Condensed Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 27, 2013	Oct. 28, 2012
Cash flows from operating activities:
Net income	$ 46,342	$ 28,821
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions:
Depreciation, amortization and impairments	42,386	35,300
Effect of acquisition fair value adjustments	2,529	33,251
Accretion of deferred financing costs and debt discount	1,255	1,819
Write-off of deferred financing costs and debt discount	7,093	0
Deferred income taxes	(7,814)	(12,586)
Stock-based compensation	21,610	16,727
Excess tax benefits on stock based compensation	0	(3,335)
(Gain) loss on disposition of property, plant and equipment	(28)	85
Changes in assets and liabilities:
Accounts receivable, net	(4,986)	(8,646)
Inventories	294	1,233
Prepaid expenses and other assets	(3,008)	5,880
Accounts payable	(12,513)	5,377
Accrued liabilities	(12,707)	(12,982)
Deferred revenue	3,674	(231)
Income taxes payable and prepaid taxes	(2,638)	(27,694)
Other liabilities	5,895	3,760
Net cash provided by operating activities	87,384	66,779
Cash flows from investing activities:
Purchases of available-for-sale investments	(1,050)	(17,122)
Proceeds from sales and maturities of available-for-sale investments	9,499	104,699
Proceeds from sales of property, plant and equipment	57	0
Purchase of property, plant and equipment	(30,750)	(18,115)
Purchase of intangible assets	(2,583)	(250)
Acquisitions, net of cash acquired	0	(491,717)
Net cash used in investing activities	(24,827)	(422,505)
Cash flows from financing activities:
Proceeds from debt issuance, net of discount	327,344	347,000
Deferred financing cost	(2,980)	(8,962)
Payment on interest rate cap	0	(1,100)
Excess tax benefits on stock based compensation	0	3,335
Proceeds from exercises of stock options	6,093	4,839
Repurchase of outstanding common stock	(15,000)	(269)
Payment of long term debt	(363,813)	(11,250)
Net cash (used in) provided by financing activities	(48,356)	333,593
Effect of exchange rate increase on cash and cash equivalents	0	65
Net increase (decrease) in cash and cash equivalents	14,201	(22,068)
Cash and cash equivalents at beginning of period	223,192	227,022
Cash and cash equivalents at end of period	$ 237,393	$ 204,954