Segment Reporting (Schedule of Information of Total Assets on Segment Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 36,476,441	$ 34,049,715
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	31,251,497	28,219,800
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	4,724,955	5,151,841
Other Segments [Member]
Segment Reporting Information [Line Items]
Total assets	$ 499,989	$ 678,074