Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net earnings	$ 658,645	$ 696,067	$ 646,033
Adjustments to reconcile net earnings to cash flows from operating activities:
Depreciation and amortization of property, plant and equipment	37,299	38,185	40,890
Amortization of intangible assets	203,154	166,076	156,394
Amortization of deferred financing costs	5,612	4,136	4,003
Non-cash stock compensation	78,827	61,766	63,027
Gain (Loss) on Disposition of Business	0	(70,860)	0
Changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable	(20,734)	52,597	(404)
Inventories	6,353	(1,150)	6,349
Unbilled Receivables	(1,202)	(21,844)	(10,305)
Accounts payable and accrued liabilities	20,176	(8,392)	7,747
Deferred revenues	25,190	8,239	(28,202)
Income taxes payable	(47,589)	3,069	(46,619)
Other, net	(1,946)	936	1,528
Cash provided by operating activities	963,785	928,825	840,441
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(3,721,758)	(1,762,883)	(305,379)
Capital expenditures	(37,305)	(36,260)	(37,644)
Capitalized Software Expenditures	(2,801)	(2,439)	(2,588)
Proceeds from Divestiture of Businesses	0	105,624	0
Proceeds from sale of assets	870	1,126	1,506
Other, net	8,138	(3,500)	(4,000)
Cash used in investing activities	(3,752,856)	(1,698,332)	(348,105)
Cash flows from financing activities:
Proceeds from senior notes	1,200,000	900,000	0
Borrowings/(payments) under revolving line of credit, net	1,750,000	180,000	(250,000)
Principal payments on convertible notes	(4,284)	(4,006)	(561)
Debt issuance costs	(17,266)	(8,044)	0
Cash dividends to stockholders	(121,130)	(100,334)	(79,859)
Treasury stock sales	3,340	2,889	2,751
Stock award tax excess windfall benefit	0	22,228	21,081
Proceeds from stock based compensation, net	9,998	18,312	10,463
Redemption Premium Convertible Debt	(14,166)	(13,126)	(1,518)
Other	(1,229)	(1,677)	(461)
Cash provided by/(used in) financing activities	2,805,263	996,242	(298,104)
Effect of foreign currency exchange rate changes on cash	(37,503)	(58,654)	(43,522)
Net increase in cash and cash equivalents	(21,311)	168,081	150,710
Cash and cash equivalents, beginning of year	778,511	610,430	459,720
Cash and cash equivalents, end of year	757,200	778,511	610,430
Cash paid for:
Interest	104,928	79,225	74,446
Income taxes, net of refunds received	329,596	280,801	300,969
Noncash investing activities:
Fair value of assets, including goodwill	4,433,085	1,876,984	324,717
Liabilities assumed	(711,327)	(114,101)	(19,338)
Cash paid, net of cash acquired	$ 3,721,758	$ 1,762,883	$ 305,379