Derivative Financial Instruments - Summary of Terms of Partnership's Total Return Swaps (Parenthetical) (Details)	Mar. 31, 2021	Dec. 31, 2020
Mizuho Capital Markets 1 [Member]
Derivative [Line Items]
Derivative, basis spread on variable rate	3.75%	3.75%
Derivative, floor interest rate	4.25%	4.25%
Mizuho Capital Markets 2 [Member]
Derivative [Line Items]
Derivative, basis spread on variable rate	0.50%	0.50%
Derivative, floor interest rate	1.00%	1.00%
Mizuho Capital Markets [Member]
Derivative [Line Items]
Derivative, basis spread on variable rate	9.00%	9.00%