Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net earnings	$ 305,571	$ 215,269
Adjustments to reconcile net earnings to cash flows from operating activities:
Depreciation and amortization of property, plant and equipment	27,669	27,271
Amortization of intangible assets	77,056	61,430
Amortization of deferred financing costs	1,772	1,772
Non-cash stock compensation	23,466	19,384
Changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable	(19,521)	18,394
Unbilled Receivables	2,990	(23,394)
Inventories	(28,422)	(7,277)
Accounts payable and accrued liabilities	16,716	33,110
Income taxes payable	5,888	10,943
Other, net	(4,111)	(7,938)
Cash provided by operating activities	409,074	348,964
Cash flows from investing activities:
Acquisitons of businesses, net of cash acquired	227,197	536,413
Capital expenditures	29,143	20,391
Proceeds from sale of assets	1,553	4,773
Other, net	(1,685)	(2,958)
Cash provided by/(used in) investing activities	(256,472)	(554,989)
Cash flows from financing activities:
Borrowings/(payments) under revolving line of credit, net	(145,000)	318,000
Principal payments on convertible notes	(25,057)	(20,123)
Cash dividends to stockholders	(31,529)	(26,722)
Stock award tax excess windfall benefit	4,101	4,287
Proceeds from stock option exercises	14,479	16,955
Treasury stock sales	1,589	1,236
Other	537	314
Cash provided by/(used in) financing activities	(181,954)	293,319
Effect of foreign currency exchange rate changes on cash	5,412	357
Net increase/(decrease) in cash and cash equivalents	(23,940)	87,651
Cash and cash equivalents, beginning of period	270,394	167,708
Cash and cash equivalents, end of period	246,454	250,813
Noncash investing activities:
Cash paid, net of cash acquired	$ 227,197	$ 536,413