Share and Unit-Based Plans - Compensation cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Compensation cost under share and unit-based plans	$ 5,368	$ 4,318	$ 16,815	$ 13,681
LTI Units
Share-based Compensation Arrangement by Share-based Payment Award
Compensation cost under share and unit-based plans	4,632	3,625	14,035	10,822
Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Compensation cost under share and unit-based plans	629	598	2,496	2,577
Phantom Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Compensation cost under share and unit-based plans	$ 107	$ 95	$ 284	$ 282