Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 186,537	$ 136,600
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	106,215	102,670
Share-based compensation expense	16,583	13,131
Provision for deferred income taxes	(10,480)	7,869
Changes in assets and liabilities (net of businesses acquired):
Receivables, net	31,282	(35,718)
Inventory	878	(1,969)
Prepaid expenses and other	(13,898)	(11,185)
Accounts payable	15,059	2,913
Accrued income taxes	(29,459)	477
Deferred revenue	8,140	14,494
Other accrued liabilities	34,690	19,346
Net cash provided by operating activities	345,547	248,628
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital purchases	(78,164)	(51,677)
Capitalized software development costs	(46,847)	(41,055)
Purchases of investments	(655,310)	(628,686)
Sales and maturities of investments	446,861	447,009
Purchase of other intangibles	(5,586)	(5,098)
Acquisition of businesses, net of cash acquired	0	(28,069)
Net cash used in investing activities	(339,046)	(307,576)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt	(1,438)	(454)
Proceeds from excess tax benefits from stock compensation	30,101	26,570
Proceeds from exercise of options	25,044	29,972
Contingent consideration payments for acquisition of business	0	(779)
Net cash provided by financing activities	53,707	55,309
Effect of exchange rate changes on cash and cash equivalents	(566)	3,184
Net increase (decrease) in cash and cash equivalents	59,642	(455)
Cash and cash equivalents at beginning of period	243,146	214,511
Cash and cash equivalents at end of period	$ 302,788	$ 214,056