CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (22,376)	$ (22,651)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, accretion and amortization	125,636	82,100
Non-cash interest expense	17,364	16,991
Deferred income tax expense (benefit)	(1,802)	17
Non-cash asset impairment and decommission costs	2,892	349
Non-cash compensation expense	3,874	3,057
Provision for doubtful accounts	168	149
Amortization of deferred financing fees	3,604	2,433
Loss from extinguishment of debt, net	142
Other non-cash items reflected in the Statements of Operations	(615)	(83)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable and costs and estimated earnings in excess of billings on uncompleted contracts, net	(13,688)	(1,259)
Prepaid and other assets	(18,434)	(10,143)
Accounts payable and accrued expenses	213	(3,293)
Accrued interest	(2,094)	(7,681)
Other liabilities	(656)	6,054
Net cash provided by operating activities	94,228	66,040
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions and related earn-outs	(209,542)	(51,148)
Capital expenditures	(36,423)	(24,852)
Other investing activities	1,308	110
Net cash used in investing activities	(244,657)	(75,890)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock		283,902
Borrowings under Revolving Credit Facility		200,000
Principal payments under capital lease obligations	(395)	(291)
Repayment of Term Loans	(4,500)	(1,250)
Proceeds from employee stock purchase/stock option plans	4,325	5,763
Payment of financing fees	(851)	(33)
Purchase of redeemable noncontrolling interests	(6,008)
Proceeds from settlement of convertible bond hedges	45,230
Net cash provided by financing activities	37,801	488,091
Effect of exchange rate changes on cash and cash equivalents	1,759	(3)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(110,869)	478,238
CASH AND CASH EQUIVALENTS:
Beginning of period	233,099	47,316
End of period	122,230	525,554
Cash paid during the period for:
Interest	61,627	49,997
Income taxes	1,653	419
SUPPLEMENTAL CASH FLOW INFORMATION OF NON-CASH INVESTING & FINANCING ACTIVITIES:
Assets acquired through capital leases	436	299
Issuance of stock for conversion of debt	$ 5,308