Accounting Pronouncements (Adoption Of New Accounting Pronouncement Adjustments To Select Tables) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023
Statements Adjusted [Abstract]
Assets	$ 20,330,165		$ 19,058,758	$ 19,002,576
Liabilities	12,698,832		11,886,313
Stockholders Equity Including Portion Attributable To Noncontrolling Interest	$ 7,631,333	$ 7,519,398	$ 7,172,445	$ 7,087,801	$ 7,030,378	$ 6,504,191