Units Outstanding (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Units Outstanding
Outstanding, beginning balance (in units)	98,322,942	98,192,098
Options exercised (in units)	143,211	5,182
Units issued (in units)	3,917,437	3,363,132
Units retired (in units)	(3,111,863)	(3,237,470)
Outstanding, ending balance (in units)	99,271,727	98,322,942