Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (206,673)	$ (24,685)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, accretion, and amortization	498,560	464,858
Non-cash interest expense	1,051	26,832
Deferred income tax expense (benefit)	195	(1,043)
Non-cash asset impairment and decommission costs	69,895	9,909
Non-cash compensation expense	21,903	17,231
Amortization of deferred financing fees	13,973	13,114
Loss from extinguishment of debt, net		25,080
Loss on remeasurement of U.S. dollar denominated intercompany loan	180,422
Gain on foreign currency swap contract		(17,891)
Other non-cash items reflected in the Statements of Operations	(5,233)	(1,207)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable and costs and estimated earnings in excess of billings on uncompleted contracts, net	24,242	(10,649)
Prepaid and other assets	(52,928)	(43,923)
Accounts payable and accrued expenses	11,129	(6,220)
Accrued interest	(13,994)	(659)
Other liabilities	(7,805)	34,541
Net cash provided by operating activities	534,737	485,288
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions	(408,711)	(1,048,748)
Capital expenditures	(162,311)	(131,347)
Proceeds from foreign currency swap contract		17,891
Other investing activities	4,291	(1,782)
Net cash used in investing activities	(566,731)	(1,163,986)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under Revolving Credit Facility	770,000	575,000
Repayments under Revolving Credit Facility	(615,000)	(490,000)
Repayment of Term Loans	(25,000)	(303,000)
Proceeds from Term Loans, net of fees	489,899	1,483,337
Payments on settlement of convertible debt		(132,592)
Payments for settlement of common stock warrants	(150,874)	(602,834)
Payment for the redemption of 8.25% Notes		(253,805)
Proceeds from 4.875% Senior Notes, net of fees		732,459
Repurchase and retirement of common stock	(400,064)
Other financing activities	9,552	(18,202)
Net cash provided by financing activities	78,513	990,363
Effect of exchange rate changes on cash and cash equivalents	(12,691)	16,480
NET INCREASE IN CASH AND CASH EQUIVALENTS	33,828	328,145
CASH AND CASH EQUIVALENTS:
Beginning of period	39,443	122,112
End of period	73,271	450,257
Cash paid during the period for:
Interest	252,425	216,103
Income taxes	7,569	6,377
SUPPLEMENTAL CASH FLOW INFORMATION OF NON-CASH ACTIVITIES:
Assets acquired through capital leases	$ 2,627	1,290
Issuance of stock for settlement of convertible debt and warrants, net of hedges		$ 284