Partners' Capital, Mezzanine Equity and Distributions (Redeemable Noncontrolling Interest- Narrative) (Details) - USD ($)			3 Months Ended	12 Months Ended
	Apr. 14, 2020	Sep. 23, 2019	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jul. 03, 2023	Apr. 03, 2023	May 17, 2022	May 16, 2022
Temporary Equity [Line Items]
Redeemable noncontrolling interest issued (in shares)			5,356	5,356
Redeemable noncontrolling interests, no preferred units issued and outstanding at December 31, 2023 and 0 preferred units issued and outstanding at December 31, 2022			$ 0	$ 0	$ 259,568,000				$ 288,629,000	$ 270,100,000
Redeemable noncontrolling interest redemption value adjustment				0	$ 30,443,000	$ 25,398,000
PIK distribution				9,993,000
Redemption accretion				1,908,000
Stock Repurchased and Retired During Period, Value				$ 1,044,000
Class A | 2023 Repurchase Program
Temporary Equity [Line Items]
Stock Repurchased and Retired During Period, Value			$ 1,000,000
Class A Convertible Preferred Stock Units
Temporary Equity [Line Items]
Convertible preferred units outstanding (in units)			23,111,918	23,111,918	25,336,778
Temporary Equity, Redemption Price Per Share							$ 33.71	$ 33.71
Temporary Equity, Accretion to Redemption Value, Adjustment				$ 3,200,000
Subsidiaries [Member] | Genesis Alkali Holdings Company, LLC [Member]
Temporary Equity [Line Items]
Preferred units, value		$ 55,000,000		18,500,000
Redeemable Noncontrolling Interest, Equity, Preferred, Commitment Period	4 years	3 years
Redeemable Noncontrolling Interest, Project Extension Period	1 year
Redeemable noncontrolling interest issued (in shares)	1,750
Redeemable Noncontrolling Interest, Equity, Preferred, Purchase Price Per Unit		$ 1,000
Redeemable Noncontrolling Interest, Equity, Preferred, Fair Value										$ 288,600,000
Redeemable noncontrolling interest redemption value adjustment				0	$ 30,443,000	25,398,000
PIK distribution				10,000,000		21,300,000
Redemption accretion				$ 1,900,000		$ 4,100,000
Subsidiaries [Member] | Genesis Alkali Holdings Company, LLC [Member] | Maximum
Temporary Equity [Line Items]
Convertible preferred units outstanding (in units)	351,750	350,000
Redeemable Noncontrolling Interest, Equity, Preferred, Amount Authorized		$ 350,000,000			$ 351,800,000
Subsidiaries [Member] | Genesis Alkali Holdings Company, LLC [Member] | Minimum
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Preferred, Amount Authorized		$ 251,800,000
Subsidiaries [Member] | Genesis Alkali Holdings Company, LLC [Member] | Redeemable Non Controlling Interest
Temporary Equity [Line Items]
Convertible preferred units outstanding (in units)		55,000	0	0						251,750