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 income	$ 15,947	$ 7,898
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation, depletion and amortization	77,638	75,255
Amortization and write-off of debt issuance costs and discount	2,682	4,161
Amortization of unearned income and initial direct costs on direct financing leases	(3,139)	(3,330)
Payments received under direct financing leases	5,167	5,167
Equity in earnings of investments in equity investees	(12,997)	(10,572)
Cash distributions of earnings of equity investees	12,400	10,352
Non-cash effect of long-term incentive compensation plans	1,565	(136)
Deferred and other tax liabilities	252	225
Unrealized loss on derivative transactions	5,666	2,642
Other, net	5,640	(1,552)
Net changes in components of operating assets and liabilities (Note 14)	3,200	(3,782)
Net cash provided by operating activities	114,021	86,328
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(29,612)	(66,051)
Cash distributions received from equity investees - return of investment	5,425	9,277
Proceeds from asset sales	358	6
Net cash used in investing activities	(23,829)	(56,768)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	187,500	333,800
Repayments on senior secured credit facility	(215,600)	(154,000)
Repayment of senior unsecured notes	0	(145,170)
Debt issuance costs	0	(159)
Contributions from noncontrolling interest	610	400
Distributions to common unitholders	(67,419)	(62,515)
Other, net	5,621	5,135
Net cash used in financing activities	(89,288)	(22,509)
Net increase in cash and cash equivalents	904	7,051
Cash and cash equivalents at beginning of period	10,300	9,041
Cash and cash equivalents at end of period	$ 11,204	$ 16,092