Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Jul. 02, 2011
Cash flows from operating activities:
Net income	$ 186,390	$ 194,564
Adjustments to reconcile net income to net cash provided by operating activities:
Provisions for doubtful accounts on accounts receivable	902	1,676
Provisions on inventory	5,960	4,892
Stock-based compensation	14,381	13,763
Deferred income taxes	(7,147)	(3,692)
Depreciation	17,168	17,939
Amortization of intangibles	13,435	15,506
Change in operating assets and liabilities, net of acquisitions:
Decrease in accounts receivable	5,929	7,191
Increase in inventories	(29,327)	(36,051)
(Increase) decrease in other current assets	(499)	4,063
Decrease (increase) in other assets	862	(1,597)
Decrease in accounts payable and other current liabilities	(18,736)	(32,652)
Increase in deferred revenue and customer advances	25,067	31,350
Increase in other liabilities	1,889	3,027
Net cash provided by operating activities	216,274	219,979
Cash flows from investing activities:
Additions to property, plant, equipment and software capitalization	(46,920)	(35,272)
Business acquisitions, net of cash acquired	(18,414)
Purchase of short-term investments	(941,612)	(829,598)
Maturity of short-term investments	816,265	690,756
Net cash used in investing activities	(190,681)	(174,114)
Cash flows from financing activities:
Proceeds from debt issuances	137,937	297,131
Payments on debt	(28,147)	(227,010)
Payments of debt issuance costs	0	(1,218)
Proceeds from stock plans	18,685	42,974
Purchase of treasury shares	(171,319)	(153,820)
Excess tax benefit related to stock option plans	5,832	15,246
Proceeds from debt swaps and other derivative contracts	475	1,970
Net cash used in financing activities	(36,537)	(24,727)
Effect of exchange rate changes on cash and cash equivalents	(3,617)	15,278
(Decrease) increase in cash and cash equivalents	(14,561)	36,416
Cash and cash equivalents at beginning of period	383,990	308,498
Cash and cash equivalents at end of period	$ 369,429	$ 344,914

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.