Consolidated Statement of Capital (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income	$ 196,816	$ 81,625
Other comprehensive income
Amounts reclassified from accumulated other comprehensive loss	1,010	1,035
Distributions to partners	(1,070)	(785)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,208	2,479
Total Partners' Capital [Member]
Net income	195,228	80,656
Other comprehensive income
Amounts reclassified from accumulated other comprehensive loss	926	951
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,208	2,479
Partnership Interest [Member]
Beginning Balance	6,109,932	6,058,147
Net income	196,816	81,625
Other comprehensive income
Other comprehensive income before reclassification	8,214	5,525
Amounts reclassified from accumulated other comprehensive loss	1,010	1,035
Distributions to partners	(108,515)	(102,284)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,208	2,479
Common units repurchased as a result of common stock repurchased by Parent Company, net of issuances	(5,973)	(3,483)
Ending Balance	6,205,692	6,043,044
Partnership Interest [Member] | Total Partners' Capital [Member]
Beginning Balance	6,072,818	6,020,639
Net income	196,091	81,020
Other comprehensive income
Other comprehensive income before reclassification	7,574	5,187
Amounts reclassified from accumulated other comprehensive loss	930	955
Deferred compensation plan, net		(101,499)
Distributions to partners	(107,445)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,208	2,479
Common units repurchased as a result of common stock repurchased by Parent Company, net of issuances	(5,973)	(3,483)
Ending Balance	6,168,203	6,005,298
Partnership Interest [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(10,227)	(18,625)
Other comprehensive income
Other comprehensive income before reclassification	7,537	5,162
Amounts reclassified from accumulated other comprehensive loss	926	951
Ending Balance	(1,764)	(12,512)
Partnership Interest [Member] | Noncontrolling Interests In Limited Partners Interest In Consolidated Partnerships [Member]
Beginning Balance	37,114	37,508
Net income	725	605
Other comprehensive income
Other comprehensive income before reclassification	640	338
Amounts reclassified from accumulated other comprehensive loss	80	80
Distributions to partners	(1,070)	(785)
Ending Balance	37,489	37,746
Partnership Interest [Member] | General Partner Preferred and Common Units [Member]
Beginning Balance	6,047,598	6,003,537
Net income	195,228	80,656
Other comprehensive income
Deferred compensation plan, net		(101,046)
Distributions to partners	(106,970)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,208	2,479
Common units repurchased as a result of common stock repurchased by Parent Company, net of issuances	(5,973)	(3,483)
Ending Balance	6,134,091	5,982,143
Partnership Interest [Member] | Limited Partner [Member]
Beginning Balance	35,447	35,727
Net income	863	364
Other comprehensive income
Other comprehensive income before reclassification	37	25
Amounts reclassified from accumulated other comprehensive loss	4	4
Distributions to partners	(475)	(453)
Ending Balance	$ 35,876	$ 35,667