Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended						9 Months Ended
	Feb. 05, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenues		$ 127,731			$ 135,895			$ 370,392	$ 401,143
Operating costs and expenses:
Operations (exclusive of depreciation and amortization)		40,003			44,924			109,721	123,045
Depreciation and amortization		26,190			24,121			75,202	72,192
General and administrative		2,332			2,714			7,569	7,322
Goodwill, Impairment Loss		35,653			0			35,653	0
Total operating costs and expenses		104,178			71,759			228,145	202,559
Operating income		23,553			64,136			142,247	198,584
Other income (expense):
Equity in earnings of equity method investments		1,316			1,334			5,186	5,217
Interest expense		(14,104)			(18,807)			(45,650)	(57,059)
Interest income		2,803			2,243			7,834	3,322
Gain on Sales-type Leases		0			35,166			33,834	35,166
Loss on early extinguishment of debt	$ 25,900	0			0			(25,915)	0
Other income (loss)		7,465			142			8,439	(57)
Total other income (expense)		(2,520)			20,078			(16,272)	(13,411)
Income before income taxes		21,033			84,214			125,975	185,173
State income tax benefit (expense)		(34)			(30)			(110)	(36)
Net Income		20,999	$ 77,954	$ 26,912	84,184	$ 47,159	$ 53,794	125,865	185,137
Allocation of net income attributable to noncontrolling interests		(3,186)			(1,839)			(6,721)	(5,920)
Net income attributable to the partners		$ 17,813			$ 82,345			$ 119,144	$ 179,217
Limited partners’ per unit interest in earnings—basic and diluted (in dollars per share)		$ 0.17			$ 0.78			$ 1.13	$ 1.70
Weighted average limited partners’ units outstanding (in shares)		105,440			105,440			105,440	105,440
Affiliates
Revenues:
Revenues		$ 100,992			$ 106,027			$ 297,983	$ 311,755
Third parties
Revenues:
Revenues		$ 26,739			$ 29,868			$ 72,409	$ 89,388