Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net earnings	$ 487,470	$ 460,097
Adjustments to reconcile net earnings to cash flows from operating activities:
Depreciation and amortization of property, plant and equipment	28,454	30,442
Amortization of intangible assets	119,766	117,179
Amortization of deferred financing costs	3,002	3,003
Non-cash stock compensation	47,035	47,011
Changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable	35,215	(5,225)
Unbilled receivables	(9,164)	(16,615)
Inventories	(7,047)	(8,833)
Accounts payable and accrued liabilities	(8,688)	10,342
Income taxes payable	(35,165)	(54,178)
Other, net	(1,311)	(3,991)
Cash provided by operating activities	659,567	579,232
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(1,024,779)	(305,254)
Capital expenditures	(27,503)	(29,835)
Proceeds from sale of assets	724	1,262
Other, net	(5,093)	(6,566)
Cash used in investing activities	(1,056,651)	(340,393)
Cash flows from financing activities:
Proceeds from (Repayments of) revolving line of credit, net	590,000	(95,000)
Principal payments on senior notes	0	0
Principal payments on convertible notes	(4,006)	(561)
Cash premiums paid on convertible note conversions	(13,126)	(1,518)
Cash dividends to stockholders	(75,210)	(59,827)
Proceeds from stock based compensation, net	19,237	26,424
Stock award tax excess windfall benefit	11,593	14,892
Treasury stock sales	2,117	2,080
Other	(1,273)	38
Cash used in financing activities	529,332	(113,472)
Effect of foreign currency exchange rate changes on cash	(42,100)	(20,975)
Net increase in cash and cash equivalents	90,148	104,392
Cash and cash equivalents, beginning of period	610,430	459,720
Cash and cash equivalents, end of period	$ 700,578	$ 564,112