Discontinued Operations and Assets Held for Sale (Allocation of Shareholders' Income (Loss) Between Continuing and Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Discontinued Operations
Income (loss) from continuing operations attributable to common shareholders	$ 852,895	$ 299,805	$ 428,531
Income (loss) from discontinued operations attributable to common shareholders	0	110	441
Net income attributable to common shareholders	$ 852,895	$ 299,915	$ 428,972