Earnings Per Unit - Computation of Basic and Diluted Earnings per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share Basic [Line Items]
NET INCOME (LOSS)	$ 181,987	$ 121,819	$ 214,368
Distributions on Series B cumulative convertible preferred units	(21,000)	(21,000)	(21,000)
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS	160,987	100,819	193,368
ALLOCATION OF NET INCOME (LOSS):
General partner interest	0	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS	160,987	100,819	193,368
Common units
ALLOCATION OF NET INCOME (LOSS):
Allocation of loss	$ 160,987	$ 100,819	$ 169,375
Weighted average common units outstanding:
Weighted average units outstanding, basic (in shares)	208,181	206,705	168,230
Effect of dilutive securities (in shares)	109	114	146
Weighted average units outstanding, diluted (in shares)	208,290	206,819	168,376
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in usd per share)	$ 0.77	$ 0.49	$ 1.01
Per unit (diluted) (in usd per share)	$ 0.77	$ 0.49	$ 1.01
Subordinated units
ALLOCATION OF NET INCOME (LOSS):
Allocation of loss	$ 0	$ 0	$ 23,993
Weighted average common units outstanding:
Weighted average units outstanding, basic (in shares)	0	0	37,740
Effect of dilutive securities (in shares)	0	0	0
Weighted average units outstanding, diluted (in shares)	0	0	37,740
NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT:
Per unit (basic) (in usd per share)	$ 0	$ 0	$ 0.64
Per unit (diluted) (in usd per share)	$ 0	$ 0	$ 0.64