Partners' Capital, Mezzanine Capital and Distributions (Changes in Redeemable Noncontrolling Interests) (Details) - USD ($)			3 Months Ended		6 Months Ended
	Apr. 14, 2020	Sep. 23, 2019	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Redeemable Noncontrolling Interest, Equity [Roll Forward]
Balance as of December 31, 2021					$ 259,568,000
Redeemable Noncontrolling Interest, Equity, Preferred, Units issued value, net of issuance costs					5,249,000
Redeemable Noncontrolling Interest, Equity, Preferred, Distributions Paid-in-Kind					9,993,000
Redemption accretion					1,908,000
Tax distributions					(6,631,000)
Balance as of May 16, 2022			$ 0		0
Adjustment to Base Preferred Return Amount					18,542,000
Subsidiary | Alkali Holdings
Redeemable Noncontrolling Interest, Equity [Roll Forward]
Redemption accretion			$ 700,000	$ 900,000	1,900,000	$ 1,600,000
Redeemable Noncontrolling Interest [Line Items]
Equity preferred units issued (in units)	1,750
Redeemable Noncontrolling Interest, Equity, Preferred, Units Issued, Value		$ 55,000,000			$ 18,500,000