Consolidated Statement of Capital (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income	$ 105,987	$ 96,832	$ 302,803	$ 178,457
Other comprehensive income (loss)
Amounts reclassified from accumulated other comprehensive income (loss)	481	1,034	1,491	2,069
Contributions from partners	10,446		10,446
Distributions to partners	(2,705)	(1,204)	(3,775)	(1,989)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,366	3,564	8,574	6,043
Total Partners' Capital [Member]
Net income	104,796	95,490	300,024	176,146
Other comprehensive income (loss)
Amounts reclassified from accumulated other comprehensive income (loss)	409	947	1,335	1,898
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,366	3,564	8,574	6,043
Partnership Interest [Member]
Beginning Balance	6,205,692	6,043,044	6,109,932	6,058,147
Net income	105,987	96,832	302,803	178,457
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassification	4,213	(2,231)	12,427	3,294
Amounts reclassified from accumulated other comprehensive income (loss)	481	1,034	1,491	2,069
Contributions from partners	10,446		10,446
Distributions to partners	(111,052)	(102,721)	(219,567)	(205,005)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,366	3,564	8,574	6,043
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(75,419)		(75,419)
Common units issued as a result of common stock issued by Parent Company, net of issuance costs / redemptions	61,284	509	61,284
Common units repurchased as a result of common stock repurchased by Parent Company, net of issuances	137		(5,836)	(2,974)
Ending Balance	6,206,135	6,040,031	6,206,135	6,040,031
Partnership Interest [Member] | Total Partners' Capital [Member]
Beginning Balance	6,168,203	6,005,298	6,072,818	6,020,639
Net income	105,248	95,922	301,339	176,942
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassification	3,760	(2,103)	11,334	3,084
Amounts reclassified from accumulated other comprehensive income (loss)	412	951	1,342	1,906
Distributions to partners	(108,347)	(101,517)	(215,792)	(203,016)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,366	3,564	8,574	6,043
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(75,419)		(75,419)
Common units issued as a result of common stock issued by Parent Company, net of issuance costs / redemptions	61,284	509	61,284
Common units repurchased as a result of common stock repurchased by Parent Company, net of issuances	137		(5,836)	(2,974)
Ending Balance	6,159,644	6,002,624	6,159,644	6,002,624
Partnership Interest [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(1,764)	(12,512)	(10,227)	(18,625)
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassification	3,743	(2,093)	11,280	3,069
Amounts reclassified from accumulated other comprehensive income (loss)	409	947	1,335	1,898
Ending Balance	2,388	(13,658)	2,388	(13,658)
Partnership Interest [Member] | Noncontrolling Interests In Limited Partners Interest In Consolidated Partnerships [Member]
Beginning Balance	37,489	37,746	37,114	37,508
Net income	739	910	1,464	1,515
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassification	453	(128)	1,093	210
Amounts reclassified from accumulated other comprehensive income (loss)	69	83	149	163
Contributions from partners	10,446		10,446
Distributions to partners	(2,705)	(1,204)	(3,775)	(1,989)
Ending Balance	46,491	37,407	46,491	37,407
Partnership Interest [Member] | General Partner Preferred and Common Units [Member]
Beginning Balance	6,134,091	5,982,143	6,047,598	6,003,537
Net income	104,796	95,490	300,024	176,146
Other comprehensive income (loss)
Distributions to partners	(107,885)	(101,067)	(214,855)	(202,113)
Restricted units issued as a result of restricted stock issued by Parent Company, net of amortization	4,366	3,564	8,574	6,043
Common units repurchased and retired as a result of common stock repurchased and retired by Parent Company	(75,419)		(75,419)
Common units issued as a result of common stock issued by Parent Company, net of issuance costs / redemptions	61,284	509	61,284
Common units repurchased as a result of common stock repurchased by Parent Company, net of issuances	137		(5,836)	(2,974)
Common units exchanged for common stock of Parent Company	1,275	99	1,275	99
Ending Balance	6,122,645	5,980,738	6,122,645	5,980,738
Partnership Interest [Member] | Limited Partner [Member]
Beginning Balance	35,876	35,667	35,447	35,727
Net income	452	432	1,315	796
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassification	17	(10)	54	15
Amounts reclassified from accumulated other comprehensive income (loss)	3	4	7	8
Distributions to partners	(462)	(450)	(937)	(903)
Common units exchanged for common stock of Parent Company	(1,275)	(99)	(1,275)	(99)
Ending Balance	$ 34,611	$ 35,544	$ 34,611	$ 35,544