Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 18,769	$ 60,518
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion and amortization	152,935	112,721
Provision for leased items no longer in use	0	12,589
Gain on sale of assets	0	(26,684)
Amortization and write-off of debt issuance costs and discount	6,820	5,260
Amortization of unearned income and initial direct costs on direct financing leases	(6,615)	(6,958)
Payments received under direct financing leases	10,334	10,334
Equity in earnings of investments in equity investees	(18,896)	(21,761)
Cash distributions of earnings of equity investees	20,162	22,235
Non-cash effect of long-term incentive compensation plans	1,662	(1,457)
Deferred and other tax liabilities	331	358
Unrealized loss on derivative transactions	3,269	561
Other, net	(3,800)	292
Net changes in components of operating assets and liabilities (Note 14)	(34,155)	8,313
Net cash provided by operating activities	150,816	176,321
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(110,970)	(126,580)
Cash distributions received from equity investees - return of investment	17,828	17,956
Investments in equity investees	(395)	0
Acquisitions	0	(759)
Contributions in aid of construction costs	0	124
Proceeds from asset sales	1,192	38,237
Net cash used in investing activities	(92,345)	(71,022)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	543,100	410,700
Repayments on senior secured credit facility	(336,000)	(477,900)
Repayment of senior unsecured notes	(145,170)	0
Debt issuance costs	(224)	(7,536)
Issuance of common units for cash, net	0	140,537
Contributions from noncontrolling interest	1,320	725
Distributions to common unitholders	(126,257)	(171,993)
Other, net	3,565	3,216
Net cash used in financing activities	(59,666)	(102,251)
Net increase (decrease) in cash and cash equivalents	(1,195)	3,048
Cash and cash equivalents at beginning of period	9,041	7,029
Cash and cash equivalents at end of period	$ 7,846	$ 10,077

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