Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Below are the third-party customers that accounted for more than 10% of our segment’s revenues:



	2017		2016		2015
Oil and Natural Gas:
Sunoco Logistics Partners L.P.	10	%	24	%	19	%
Valero Energy Corporation	9	%	11	%	15	%
Drilling:
QEP Resources, Inc.	26	%	28	%	25	%
Whiting Petroleum Corp. (formerly Kodiak Oil and Gas Corp.)	7	%	18	%	7	%
Mid-Stream:
ONEOK, Inc.	36	%	30	%	29	%
Range Resources Corporation	9	%	10	%	5	%
Koch Energy Services, LLC	8	%	11	%	9	%
Tenaska Resources, LLC	6	%	10	%	18	%
Laclede Group, Inc.	1	%	9	%	12	%

Schedule of Fair Values of the Net Assets (Liabilities)

At December 31, 2017, the fair values of the net assets (liabilities) we had with each of the counterparties with respect to all of our commodity derivative transactions are listed in the table below:



	December 31, 2017
	(In millions)
Canadian Imperial Bank of Commerce	$	0.7
Bank of America Merrill Lynch	(2.5		)
Bank of Montreal	(5.3		)
Total assets (liabilities)	$	(7.1	)

Schedule of Revision to Previous Reported Financial Information

The following table presents the effect of the revision on the selected line items previously reported in the consolidated cash flows statement for the year ended December 31, 2017:



	Year Ended December 31,
	2017
	As Reported			Adjustment			As Revised
	(In thousands)
OPERATING ACTIVITIES:
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts payable	$	21,824		$	(13,632	)	$	8,192
Net cash provided by operating activities	279,588			(13,632		)	265,956

INVESTING ACTIVITIES:
Capital expenditures	(269,185		)	13,632			(255,553		)
Net cash used in investing activities	(306,998		)	13,632			(293,366		)

Supplemental disclosure of cash flow information:
Changes in accounts payable and accrued liabilities related to purchases of property, plant, and equipment	$	(6,942	)	$	(13,632	)	$	(20,574	)