Consolidated Statement of Partners' Capital Statement - USD ($) $ in Thousands	Total	Common Unitholders	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2018	$ 2,643,434	$ 2,763,925	$ (120,491)
Comprehensive income:
Net income	734,404	734,404
Total other comprehensive income (loss)	(27,454)		(27,454)
Comprehensive income	706,950	734,404	(27,454)
Distributions	(688,635)	(688,635)
Equity-based incentive compensation expense	22,577	22,577
Issuance of limited partner units in settlement of equity-based incentive plan awards	480	480
Payments associated with settlement of equity-based incentive compensation	(9,764)	(9,764)
Other	(586)	(586)
Ending balance at Sep. 30, 2019	2,674,456	2,822,401	(147,945)
Beginning balance at Jun. 30, 2019	2,637,779	2,774,047	(136,268)
Comprehensive income:
Net income	273,038	273,038
Total other comprehensive income (loss)	(11,677)		(11,677)
Comprehensive income	261,361	273,038	(11,677)
Distributions	(231,258)	(231,258)
Equity-based incentive compensation expense	6,773	6,773
Other	(199)	(199)
Ending balance at Sep. 30, 2019	2,674,456	2,822,401	(147,945)
Beginning balance at Dec. 31, 2019	2,715,028	2,877,105	(162,077)
Comprehensive income:
Net income	633,045	633,045
Total other comprehensive income (loss)	(1,227)		(1,227)
Comprehensive income	631,818	633,045	(1,227)
Distributions	(697,264)	(697,264)
Equity-based incentive compensation expense	5,580	5,580
Repurchases of common units	(251,950)	(251,950)
Issuance of limited partner units in settlement of equity-based incentive plan awards	600	600
Payments associated with settlement of equity-based incentive compensation	(14,700)	(14,700)
Other	(668)	(668)
Ending balance at Sep. 30, 2020	2,388,444	2,551,748	(163,304)
Beginning balance at Jun. 30, 2020	2,454,738	2,620,365	(165,627)
Comprehensive income:
Net income	211,638	211,638
Total other comprehensive income (loss)	2,323		2,323
Comprehensive income	213,961	211,638	2,323
Distributions	(231,245)	(231,245)
Equity-based incentive compensation expense	1,169	1,169
Repurchases of common units	(49,968)	(49,968)
Other	(211)	(211)
Ending balance at Sep. 30, 2020	$ 2,388,444	$ 2,551,748	$ (163,304)