Unaudited Consolidated Condensed Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jul. 28, 2013	Jul. 29, 2012
Cash flows from operating activities:
Net income	$ 33,889	$ 12,231
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions:
Depreciation, amortization and impairments	28,937	22,545
Effect of acquisition fair value adjustments	2,529	28,600
Accretion of deferred financing costs and debt discount	1,010	1,081
Write-off of deferred financing costs and debt discount	8,773	0
Deferred income taxes	(6,529)	(12,425)
Stock-based compensation	14,782	10,245
Excess tax benefits on stock based compensation	0	(2,913)
(Gain) loss on disposition of property, plant and equipment	(27)	85
Changes in assets and liabilities:
Accounts receivable, net	(11,435)	(13,079)
Inventories	(5,659)	3,426
Prepaid expenses and other assets	46	6,301
Accounts payable	(2,479)	(2,344)
Accrued liabilities	(10,140)	(19,764)
Deferred revenue	1,532	1,314
Income taxes payable and prepaid taxes	(1,389)	(24,757)
Other liabilities	4,605	1,325
Net cash provided by operating activities	58,445	11,871
Cash flows from investing activities:
Purchases of available-for-sale investments	(1,050)	(10,106)
Proceeds from sales and maturities of available-for-sale investments	8,998	103,199
Proceeds from sales of property, plant and equipment	57	0
Purchase of property, plant and equipment	(23,565)	(10,715)
Purchase of intangible assets	(2,583)	0
Acquisitions, net of cash acquired	0	(491,717)
Net cash used in investing activities	(18,143)	(409,339)
Cash flows from financing activities:
Proceeds from debt issuance, net of discount	326,448	347,000
Deferred financing cost	(2,085)	(8,962)
Payment on interest rate cap	0	(1,100)
Excess tax benefits on stock based compensation	0	2,913
Proceeds from exercises of stock options	8,328	2,413
Repurchase of outstanding common stock	0	(269)
Payment of long term debt	(359,125)	(5,625)
Net cash (used in) provided by financing activities	(26,434)	336,370
Effect of exchange rate increase on cash and cash equivalents	0	(66)
Net increase (decrease) in cash and cash equivalents	13,868	(61,164)
Cash and cash equivalents at beginning of period	223,192	227,022
Cash and cash equivalents at end of period	$ 237,060	$ 165,858