Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 86,209	$ 61,390
Adjustments to reconcile net income to net cash provided by operating activities:
Loss/(income) from discontinued operations	10	(2,673)
Depreciation and amortization	48,781	37,406
Compensation cost related to equity awards	5,584	5,234
Excess tax benefit from share-based compensation	(2,090)	(1,010)
Deferred income taxes	20,063	19,277
Net gain on sale of assets	(2,708)	(4,282)
Gain on sale of investments	(894)	0
Gain on insurance recoveries	(1,043)	0
Insurance proceeds received	24	0
Changes in assets and liabilities which provided (used) cash, net of effect of acquisitions:
Accounts receivable trade, net	(13,650)	(5,656)
Materials and supplies	(531)	(255)
Prepaid expenses and other	243	(2,346)
Accounts payable and accrued expenses	(14,204)	20,767
Other assets and liabilities, net	(179)	(620)
Net cash provided by operating activities from continuing operations	125,615	127,232
Net cash (used in)/provided by operating activities from discontinued operations	(15)	913
Net cash provided by operating activities	125,600	128,145
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(106,386)	(57,642)
Grant proceeds from outside parties	18,773	25,198
Cash paid for acquisitions, net of cash acquired	(89,935)	0
Proceeds from sale of investments	1,369	208
Proceeds from disposition of property and equipment	4,054	4,090
Net cash used in investing activities from continuing operations	(172,125)	(28,146)
Net cash provided by investing activities from discontinued operations	0	1,831
Net cash used in investing activities	(172,125)	(26,315)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on long-term borrowings, including capital leases	(418,907)	(20,433)
Proceeds from issuance of long-term debt	445,424	0
Debt amendment costs	(4,742)	(1,641)
Proceeds from employee stock purchases	13,238	7,259
Treasury stock purchases	(1,292)	(849)
Excess tax benefit from share-based compensation	2,090	1,010
Net cash provided by/(used in) financing activities from continuing operations	35,811	(14,654)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(1,083)	3,680
CHANGE IN CASH BALANCES INCLUDED IN CURRENT ASSETS OF DISCONTINUED OPERATIONS	1	96
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(11,796)	90,952
CASH AND CASH EQUIVALENTS, beginning of period	27,417	105,707
CASH AND CASH EQUIVALENTS, end of period	$ 15,621	$ 196,659