UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net loss	$ (36,914)	$ (3,845)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	28,116	26,526
Noncash lease expense	765	0
Amortization of debt issuance costs	1,080	1,040
Deferred Purchase Price Obligation	4,427	21,658
Unit-based and noncash compensation	2,526	1,962
(Loss) income from equity method investees	441	(1,386)
Distributions from equity method investees	8,583	9,644
Gain on asset sales, net	961	74
Long-lived asset impairment	44,951	0
Changes in operating assets and liabilities:
Accounts receivable	4,675	3,490
Trade accounts payable	271	(3,294)
Accrued expenses	(1,199)	1,472
Due from (to) affiliate	80	(645)
Deferred revenue, net	2,323	1,130
Ad valorem taxes payable	(6,184)	(4,495)
Accrued interest	3,111	3,073
Accrued environmental remediation, net	(548)	(360)
Other, net	(2,832)	(4,686)
Net cash provided by operating activities	52,711	51,210
Cash flows from investing activities:
Capital expenditures	(60,848)	(40,778)
Proceeds from asset sale (net of cash of $1,475)	89,461	0
Other, net	(120)	(221)
Net cash provided by (used in) investing activities	28,493	(40,999)
Cash flows from financing activities:
Distributions to unitholders	(45,281)	(45,053)
Borrowings under Revolving Credit Facility	69,000	50,000
Repayments under Revolving Credit Facility	(101,000)	(10,000)
Other, net	(2,968)	(3,222)
Net cash used in financing activities	(80,249)	(8,275)
Net change in cash and cash equivalents	955	1,936
Cash and cash equivalents, beginning of period	4,345	1,430
Cash and cash equivalents, end of period	5,300	3,366
Supplemental cash flow disclosures:
Cash interest paid	15,229	12,207
Less capitalized interest	1,915	1,222
Interest paid (net of capitalized interest)	13,314	10,985
Cash paid for taxes	0	0
Noncash investing and financing activities
Capital expenditures in trade accounts payable (period-end accruals)	23,389	19,943
Topic 606
Noncash investing and financing activities
Capital expenditures relating to contributions in aid of construction for day 1 adoption	0	33,123
Topic 842
Noncash investing and financing activities
Right-of-use assets relating to Topic 842	$ 5,448	$ 0