CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES:
Net income	$ 112,476	$ 102,400
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of assets	0	(2,955)
Change in fair value of contingent consideration	(2,140)	0
Accelerated amortization of term loan financing fees	1,241	0
Stock compensation expense	7,718	7,741
Excess tax benefit of stock options exercised	(14,549)	(13,430)
Depreciation	24,161	20,872
Amortization	6,893	4,134
Deferred income taxes	18,734	12,110
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:
Accounts receivable	(22,584)	(11,688)
Accounts payable	(5,531)	(5,436)
Accrued liabilities	(4,987)	9,042
Deferred revenues	(566)	1,826
Other assets and liabilities	(1,172)	4,689
Net cash provided by operating activities	119,694	129,305
INVESTING ACTIVITIES:
Payments for acquisitions and international investments, net of cash acquired	(280,823)	(67,826)
Purchase of short-term investments	(403)	(911)
Proceeds from sale of assets	389	8,000
Capital expenditures	(23,652)	(25,017)
Net cash used in investing activities	(304,489)	(85,754)
FINANCING ACTIVITIES:
Repayment of long-term debt	(5,260)	(44,126)
Borrowings on senior credit facility	933,516	416,691
Repayments on senior credit facility	(806,916)	(434,940)
Payments of deferred consideration	(12,834)	0
Payments on capital lease obligations	(1,456)	(1,829)
Purchase/ cancellation of treasury stock	(4,302)	(24,260)
Proceeds from other issuance of common stock	27,069	25,334
Excess tax benefit of stock options exercised	14,549	13,430
Net cash provided by/ (used in) financing activities	144,366	(49,700)
Effect of exchange rate changes on cash	1,575	(1,367)
Net decrease in cash and cash equivalents	(38,854)	(7,516)
Cash and cash equivalents at beginning of period	77,053	15,767
Cash and cash equivalents at end of period	38,199	8,251
NON-CASH ACTIVITIES:
Net issuance of notes payable for certain acquisitions	$ 4,922	$ 31,042

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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. Alternate captions include Noncash Interest Expense.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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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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The effect of exchange rate changes on cash balances held in foreign currencies.

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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 equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified equity-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element reduces net cash provided by operating activities.

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The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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

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The fair value of notes issued in noncash investing and financing activities.

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