Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ (675,658)	$ (1,617,323)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, amortization and accretion	392,017	467,329
Deferred income taxes	(186,232)	(195,308)
Reduction in value of assets including discontinued operations	462,461	1,563,269
Stock based and performance share unit compensation expense	34,167	34,721
Other reconciling items, net	(10,392)	18,348
Changes in operating assets and liabilities, net of acquisitions and dispositions:
Accounts receivable	155,717	438,698
Inventory and other current assets	(5,028)	10,924
Accounts payable	(8,692)	(105,683)
Accrued expenses	(41,617)	(74,741)
Income taxes	(4,515)	(30,254)
Other, net	34,447	55,507
Net Cash Provided by (Used in) Operating Activities, Total	146,675	565,487
Cash flows from investing activities:
Payments for capital expenditures	(74,071)	(318,908)
Purchase of Leased Vessel		46,442
Other	6,238	(1,425)
Net Cash Provided by (Used in) Investing Activities, Total	(67,833)	(366,775)
Cash flows from financing activities:
Payment to Extinguish Capital Lease Obligation		20,933
Proceeds from issuance of long-term debt		10,357
Principal payments of long-term debt	(337,576)	(15,775)
Payment of debt acquisition costs	(2,675)
Payments of Ordinary Dividends, Common Stock	12,111	36,081
Proceeds from exercise of stock options		8,800
Other	(5,410)	(3,760)
Net Cash Provided by (Used in) Financing Activities, Total	(357,772)	(57,392)
Payments on revolving line of credit	325,123	7,475
Proceeds From Revolving Line Of Credit	325,123	7,475
Effect of exchange rate changes on cash	(6,932)	(692)
Net increase in cash and cash equivalents	(285,862)	140,628
Cash and cash equivalents at beginning of period	564,017	393,046
Cash and cash equivalents at end of period	$ 278,155	$ 533,674