Supplemental Guarantor / Non-Guarantor Financial Information - Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Revenues:		$ 547,480	$ 494,495	$ 497,848
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)		210,623	170,524	147,692
Depreciation and amortization		99,092	93,800	99,578
General and administrative		17,003	12,637	9,989
Goodwill impairment	$ 35,700	0	11,034	35,653
Total operating costs and expenses		326,718	287,995	292,912
Operating income		220,762	206,500	204,936
Equity in earnings of subsidiaries		0	0	0
Equity in earnings (losses) of equity method investments		(260)	12,432	6,647
Interest expense		(82,560)	(53,818)	(59,424)
Interest income		91,406	29,925	10,621
Gain on sales-type lease		0	24,677	33,834
Loss on early extinguishment of debt		0	0	(25,915)
Gain on sale of assets and other		668	6,179	8,691
Total other income (expense)		9,254	19,395	(25,546)
Income before income taxes		230,016	225,895	179,390
State income tax expense		(111)	(32)	(167)
Net income		229,905	225,863	179,223
Allocation of net income attributable to noncontrolling interests		(13,122)	(10,917)	(8,740)
Net income attributable to the partners		216,783	214,946	170,483
Affiliates
Revenues:
Revenues:		438,280	390,849	399,809
Third parties
Revenues:
Revenues:		109,200	103,646	98,039
Parent
Operating costs and expenses:
Loss on early extinguishment of debt				(25,915)
Guarantor Restricted Subsidiaries
Operating costs and expenses:
Loss on early extinguishment of debt				0
Non-Guarantor Non-Restricted Subsidiaries
Operating costs and expenses:
Loss on early extinguishment of debt				0
Reportable Legal Entities | Parent
Revenues:
Revenues:		0	0	0
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)		0	0	0
Depreciation and amortization		0	0	0
General and administrative		3,777	3,647	3,227
Goodwill impairment			0	0
Total operating costs and expenses		3,777	3,647	3,227
Operating income		(3,777)	(3,647)	(3,227)
Equity in earnings of subsidiaries		299,319	275,558	254,608
Equity in earnings (losses) of equity method investments		0	0	0
Interest expense		(78,759)	(49,864)	(55,298)
Interest income		0	0	26
Gain on sales-type lease			0	0
Gain on sale of assets and other		0	0	289
Total other income (expense)		220,560	225,694	173,710
Income before income taxes		216,783	222,047	170,483
State income tax expense		0	0	0
Net income		216,783	222,047	170,483
Allocation of net income attributable to noncontrolling interests		0	0	0
Net income attributable to the partners		216,783	222,047	170,483
Reportable Legal Entities | Parent | Affiliates
Revenues:
Revenues:		0	0	0
Reportable Legal Entities | Parent | Third parties
Revenues:
Revenues:		0	0	0
Reportable Legal Entities | Guarantor Restricted Subsidiaries
Revenues:
Revenues:		547,480	494,495	497,848
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)		206,945	167,832	146,585
Depreciation and amortization		99,092	93,800	99,578
General and administrative		13,226	8,990	6,762
Goodwill impairment			11,034	35,653
Total operating costs and expenses		319,263	281,656	288,578
Operating income		228,217	212,839	209,270
Equity in earnings of subsidiaries		8,071	2,532	219
Equity in earnings (losses) of equity method investments		(3,585)	8,897	5,105
Interest expense		(20,296)	(8,174)	(4,126)
Interest income		91,406	29,925	10,592
Gain on sales-type lease			31,778	33,834
Gain on sale of assets and other		668	6,179	8,402
Total other income (expense)		76,264	71,137	54,026
Income before income taxes		304,481	283,976	263,296
State income tax expense		(111)	(32)	(167)
Net income		304,370	283,944	263,129
Allocation of net income attributable to noncontrolling interests		(5,051)	(8,386)	(8,521)
Net income attributable to the partners		299,319	275,558	254,608
Reportable Legal Entities | Guarantor Restricted Subsidiaries | Affiliates
Revenues:
Revenues:		438,280	390,849	399,809
Reportable Legal Entities | Guarantor Restricted Subsidiaries | Third parties
Revenues:
Revenues:		109,200	103,646	98,039
Reportable Legal Entities | Non-Guarantor Non-Restricted Subsidiaries
Revenues:
Revenues:		0	0	0
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)		3,678	2,692	1,107
Depreciation and amortization		0	0	0
General and administrative		0	0	0
Goodwill impairment			0	0
Total operating costs and expenses		3,678	2,692	1,107
Operating income		(3,678)	(2,692)	(1,107)
Equity in earnings of subsidiaries		0	0	0
Equity in earnings (losses) of equity method investments		3,325	3,535	1,542
Interest expense		0	0	0
Interest income		16,495	4,220	3
Gain on sales-type lease			0	0
Gain on sale of assets and other		0	0
Total other income (expense)		19,820	7,755	1,545
Income before income taxes		16,142	5,063	438
State income tax expense		0	0	0
Net income		16,142	5,063	438
Allocation of net income attributable to noncontrolling interests		(8,071)	(2,531)	(219)
Net income attributable to the partners		8,071	2,532	219
Reportable Legal Entities | Non-Guarantor Non-Restricted Subsidiaries | Affiliates
Revenues:
Revenues:		0	0	0
Reportable Legal Entities | Non-Guarantor Non-Restricted Subsidiaries | Third parties
Revenues:
Revenues:		0	0	0
Eliminations
Revenues:
Revenues:		0	0	0
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)		0	0	0
Depreciation and amortization		0	0	0
General and administrative		0	0	0
Goodwill impairment			0	0
Total operating costs and expenses		0	0	0
Operating income		0	0	0
Equity in earnings of subsidiaries		(307,390)	(278,090)	(254,827)
Equity in earnings (losses) of equity method investments		0	0	0
Interest expense		16,495	4,220	0
Interest income		(16,495)	(4,220)	0
Gain on sales-type lease			(7,101)	0
Loss on early extinguishment of debt				0
Gain on sale of assets and other		0	0	0
Total other income (expense)		(307,390)	(285,191)	(254,827)
Income before income taxes		(307,390)	(285,191)	(254,827)
State income tax expense		0	0	0
Net income		(307,390)	(285,191)	(254,827)
Allocation of net income attributable to noncontrolling interests		0	0	0
Net income attributable to the partners		(307,390)	(285,191)	(254,827)
Eliminations | Affiliates
Revenues:
Revenues:		0	0	0
Eliminations | Third parties
Revenues:
Revenues:		$ 0	$ 0	$ 0