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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Cash flows from operating activities    
Net income (loss) $ 117,759 $ (154,095) [1]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 65,095 68,975 [1]
Impairments 6,518 272,624 [1]
Non-cash equity-based compensation expense 1,291 1,097 [1]
Deferred income taxes 1,852 5,809 [1]
Accretion and amortization of long-term obligations, net 5,496 2,112 [1]
Equity income, net [2],[3],[4] (16,814) (18,220) [1]
Distributions from equity investment earnings [3] 19,855 18,706 [1]
Gain (loss) on divestiture and other, net 632 6 [1]
Changes in assets and liabilities:    
(Increase) decrease in accounts receivable, net 12,513 (14,759) [1]
Increase (decrease) in accounts and imbalance payables and accrued liabilities, net 18,446 12,897 [1]
Change in other items, net 3,240 (900) [1]
Net cash provided by operating activities 235,883 194,252 [1]
Cash flows from investing activities    
Capital expenditures (136,987) (211,567) [1]
Investments in equity affiliates 474 (4,878) [1]
Distributions from equity investments in excess of cumulative earnings [3] 4,784 [5] 2,964 [1]
Net cash used in investing activities (842,818) (214,224) [1]
Cash flows from financing activities    
Borrowings, net of debt issuance costs 356,162 140,000 [1]
Repayments of debt 0 (31,150) [1]
Increase (decrease) in outstanding checks (994) (2,198) [1]
Distributions to WGP unitholders [6] (88,389) (68,409) [1]
Net contributions from (distributions to) Anadarko (27,632) 1,293 [1]
Above-market component of swap extensions with Anadarko [6] 6,813 0 [1]
Net cash provided by (used in) financing activities 618,697 12,582 [1]
Net increase (decrease) in cash and cash equivalents 11,762 (7,390) [1]
Cash and cash equivalents at beginning of period 99,694 [7] 67,213 [1]
Cash and cash equivalents at end of period 111,456 59,823 [1]
Supplemental disclosures    
Net distributions to (contributions from) Anadarko of other assets 714 205 [1]
Interest paid, net of capitalized interest 18,223 17,596 [1]
Taxes paid (reimbursements received) 67 (138) [1]
Delaware Basin JV Gathering LLC [Member]    
Supplemental disclosures    
Acquisition of DBJV from Anadarko 0 174,276 [1]
Western Gas Partners, LP [Member]    
Cash flows from financing activities    
Proceeds from the issuance of common units, net of offering expenses 0 31,075 [1]
Distributions to noncontrolling interest owners of WES (63,425) (54,879) [1]
Western Gas Partners, LP [Member] | Series A Preferred Units [Member]    
Cash flows from financing activities    
Proceeds from the issuance of WES Series A Preferred units, net of offering expenses 440,000 0 [1]
Affiliates [Member]    
Cash flows from investing activities    
Contributions in aid of construction costs from affiliates 2,369 0 [1]
Acquisitions from affiliates (713,596) (765) [1]
Affiliates [Member] | Western Gas Partners, LP [Member]    
Cash flows from financing activities    
Distributions to WGP unitholders [8] (606) (530)
Third Parties [Member]    
Cash flows from investing activities    
Proceeds from the sale of assets to third parties 138 22 [1]
Chipeta Processing Limited Liability Company [Member]    
Cash flows from financing activities    
Distributions to Chipeta noncontrolling interest owner $ (3,838) $ (3,150) [1]
[1] Financial information has been recast to include the financial position and results attributable to the Springfield system. See Note 1 and Note 2.
[2] Income earned from equity investments is classified as affiliate. See Note 1.
[3] Income earned on, distributions from and contributions to equity investments are classified as affiliate. See Note 1.
[4] Represents amounts earned or incurred on and subsequent to the date of acquisition of WES assets, as well as amounts earned or incurred by Anadarko on a historical basis related to WES assets prior to the acquisition of such assets by WES, recognized under gathering, treating or processing agreements, and purchase and sale agreements.
[5] Distributions in excess of cumulative earnings, classified as investing cash flows in the consolidated statements of cash flows, is calculated on an individual investment basis.
[6] See Note 5.
[7] Financial information has been recast to include the financial position and results attributable to the Springfield system. See Note 1 and Note 2.
[8] Represents distributions paid to other subsidiaries of Anadarko under WES’s partnership agreement (see Note 3 and Note 4).