Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net earnings	$ 195,290	$ 131,006
Adjustments to reconcile net earnings to cash flows from operating activities:
Depreciation and amortization of property, plant and equipment	18,865	18,161
Amortization of intangible assets	50,266	38,289
Amortization of deferred financing costs	1,181	1,181
Non-cash stock compensation	15,808	13,118
Changes in operating assets and liabilities, net of acquired businesses:
Accounts receivable	(26,735)	18,394
Unbilled Receivables	3,988	(23,394)
Inventories	(25,312)	(998)
Accounts payable and accrued liabilities	17,446	15,626
Income taxes payable	2,175	1,910
Other, net	(10,455)	(7,938)
Cash provided by operating activities	242,517	205,355
Cash flows from investing activities:
Acquisitons of businesses, net of cash acquired	204,612	14,651
Capital expenditures	19,390	14,113
Proceeds from sale of assets	1,123	4,322
Other, net	(1,361)	(2,169)
Cash provided by/(used in) investing activities	(224,240)	(26,611)
Cash flows from financing activities:
Borrowings/(payments) under revolving line of credit, net	(75,000)	(40,000)
Principal payments on convertible notes	(23,536)	(3,013)
Cash dividends to stockholders	(21,002)	(17,793)
Stock award tax excess windfall benefit	3,729	2,862
Proceeds from stock option exercises	12,914	8,489
Treasury stock sales	1,059	775
Other	107	(115)
Cash provided by/(used in) financing activities	(101,943)	(48,565)
Effect of foreign currency exchange rate changes on cash	9,299	(7,147)
Net increase/(decrease) in cash and cash equivalents	(74,367)	123,032
Cash and cash equivalents, beginning of period	270,394
Cash and cash equivalents, end of period	196,027
Noncash investing activities:
Cash paid, net of cash acquired	$ 204,612	$ 14,651

The net amount, including income tax payments, of deferred income taxes and income tax credits less the tax benefit from exercise of stock options.

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The component of interest expense comprised of the periodic charge against earnings over the life of the financing arrangement to which such costs relate.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from share-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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The net change during the reporting period in the aggregate amount of obligations and expenses incurred but not paid.

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The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The net cash inflow (outflow) from financing activity for the period.

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The net cash inflow (outflow) from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities include all transactions and events that are not defined as investing or financing activities. Operating activities generally involve producing and delivering goods and providing services. Cash flows from operating activities are generally the cash effects of transactions and other events that enter into the determination of net income.

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The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

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Cash payments made during the current period for operating activities other than those that have been specifically listed above.

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The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow from the entity's earnings to the shareholders.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The net cash inflow (outflow) from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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Cash received from sales of assets, other than those represented by other elements (securities, loans, mortgages, real estate).

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The cash inflow from the issuance of an equity stock that has been previously reacquired by the entity.

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The cash outflow to pay off an obligation from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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