Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net earnings	$ 339,830	$ 305,571
Adjustments to reconcile net earnings to cash flows from operating activities:
Depreciation and amortization of property, plant and equipment	28,402	27,669
Amortization of intangible assets	82,398	77,056
Amortization of deferred financing costs	1,750	1,772
Non-cash stock compensation	30,143	23,466
Changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable	6,685	(19,521)
Unbilled receivables	(2,698)	2,990
Inventories	(2,985)	(28,422)
Accounts payable and accrued liabilities	(8,617)	16,716
Income taxes	(14,258)	5,888
Other, net	5,564	(4,111)
Cash provided by operating activities	466,214	409,074
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(1,445,549)	(227,197)
Capital expenditures	(29,236)	(29,143)
Proceeds from sale of assets	1,196	1,553
Other, net	(542)	(1,685)
Cash used in investing activities	(1,474,131)	(256,472)
Cash flows from financing activities:
Borrowings/(payments) under revolving line of credit, net	1,050,000	(145,000)
Principal payments on convertible notes	(26,826)	(25,057)
Debt issuance costs	(4,551)	0
Cash dividends to stockholders	(40,102)	(31,529)
Stock award tax excess windfall benefit	19,873	4,101
Proceeds from stock option exercises	40,105	14,479
Treasury stock sales	1,623	1,589
Redemption Premium Convertible Debt	(19,149)	0
Other	(979)	(537)
Cash provided by/(used in) financing activities	1,019,994	(181,954)
Effect of foreign currency exchange rate changes on cash	4,931	5,412
Net increase/(decrease) in cash and cash equivalents	17,008	(23,940)
Cash and cash equivalents, end of period	338,101	270,394
Cash and cash equivalents, end of period	$ 355,109	$ 246,454