CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (138,032)	$ (400,314)	$ 100,066
Adjustments to reconcile net income (loss) to net cash provided by operating activities -
Depreciation, depletion and amortization	309,746	295,322	319,806
Loss on sale of assets	0	22,045	0
Impairment expense	0	280,826	0
Amortization and write-off of debt issuance costs and premium or discount	13,716	22,610	10,766
Amortization of unearned income and initial direct costs on direct financing leases	0	(8,847)	(12,247)
Payments received under previously owned direct financing leases	70,000	56,837	20,668
Equity in earnings of investments in equity investees	(57,898)	(64,019)	(56,484)
Cash distributions of earnings of equity investees	57,080	63,721	56,081
Non-cash effect of long-term incentive compensation plans	8,783	(3,693)	8,496
Deferred and other tax liabilities	980	512	65
Cancellation of debt income	0	(27,302)	0
Unrealized losses on derivative transactions	30,700	1,191	12,586
Other, net	12,832	19,229	(6,418)
Net changes in components of operating assets and liabilities	30,044	38,627	(71,098)
Net cash provided by operating activities	337,951	296,745	382,287
CASH FLOWS FROM INVESTING ACTIVITIES:
Payments to acquire fixed and intangible assets	(301,395)	(144,133)	(163,248)
Cash distributions received from equity investees—return of investment	27,026	17,340	21,250
Investments in equity investees	(352)	0	0
Proceeds from asset sales	604	23,037	1,187
Net cash used in investing activities	(274,117)	(103,756)	(140,811)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on senior secured credit facility	776,300	1,023,000	815,100
Repayments on senior secured credit facility	(1,371,000)	(1,338,600)	(825,900)
Proceeds from issuance of senior unsecured notes (Note 10)	259,375	1,500,000	0
Net proceeds from issuance of preferred units (Note 11)	93,100	0	122,900
Repayment of senior unsecured notes (Note 10)	(80,859)	(1,185,096)	0
Debt issuance costs	(12,348)	(26,680)	0
Contributions from noncontrolling interests	703	2,354	5,652
Distributions to noncontrolling interests	(903)	0	0
Distributions to Class A Convertible Preferred unitholders (Note 11)	(74,736)	(74,736)	(43,506)
Distributions to common unitholders (Note 11)	(73,548)	(122,580)	(269,674)
Cash proceeds from the sale of a noncontrolling interest in a subsidiary	418,140	0	0
Other, net	(84)	(38)	57
Net cash used in financing activities	(65,860)	(222,376)	(195,371)
Net increase (decrease) in cash and cash equivalents and restricted cash	(2,026)	(29,387)	46,105
Cash and cash equivalents and restricted cash at beginning of period	27,018	56,405	10,300
Cash and cash equivalents and restricted cash at end of period	$ 24,992	$ 27,018	$ 56,405