Shareholders' Equity (Schedule Of Net Income (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Line Items]
Net income to common shareholders	$ 904,959	$ 42,591	$ 2,179,844	$ 1,208,754
Adjustment of redeemable noncontrolling interests	(42,565)	(628)	(81,267)	7,087
Adjusted net income to common shareholders	$ 862,394	$ 41,963	$ 2,098,577	$ 1,215,841
Basic common shares outstanding	12,987	13,315	13,058	13,382
Diluted common shares outstanding	13,017	13,345	13,082	13,406
Earnings Per Share, Basic	$ 66.40	$ 3.15	$ 160.71	$ 90.86
Earnings Per Share, Diluted	$ 66.25	$ 3.14	$ 160.42	$ 90.69
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Dilutive potential common shares from restricted stock units and restricted stock	30	30	24	24