Other Supplement Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Financial Information [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash Recorded in Consolidated Balance Sheets

Cash, cash equivalents and restricted cash are recorded in our consolidated balance sheets as follows as of December 31:

	2016		2015
Cash and cash equivalents	$	613,534	$	80,171
Restricted cash		2,517		58,715
	$	616,051	$	138,886

Schedule of Supplemental Cash Flows and Noncash Transactions

Supplemental cash flows and noncash transactions were as follows as of and for the years ended December 31:

	2016			2015			2014
Supplemental cash flows information:
Cash paid for interest	$	78,320		$	78,410		$	56,764
Cash paid for income taxes		—			—			—
Noncash transactions - changes in accrued capital    expenditures		(69,667	)		(47,580	)		(56,129	)

Schedule of Accrued Liabilities

Accrued liabilities consisted of the following as of December 31:

	2016		2015
Accrued AFE costs	$	73,808	$	202,439
Social obligation payments		86,473		115,110
Funds from release of letter of credit on Block 9		18,375		—
Interest		13,793		7,843
Angolan consumption tax and withholding on services		9,796		13,421
Bonuses		8,900		12,300
General expenses		5,849		5,467
Seismic and other operating costs		5,625		9,782
Other		4,799		3,330
Total accrued liabilities	$	227,418	$	369,692