Condensed Financial Information Of Parent Company Condensed Financial Information Of Parent Company (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	$ 606,959	$ (1,237,574)	$ 468,636
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
(Increase) decrease in other assets	(97,181)	(105,749)	30,261
Net Cash Provided by (Used in) Financing Activities [Abstract]
Restricted stock surrendered	(8,505)	(75,369)	(162,965)
Cash dividends paid, net	(119,443)	(159,748)	(289,048)
Parent Only
Condensed Financial Statements, Captions [Line Items]
Net earnings (loss)	606,959	(1,237,574)	468,636
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
(Increase) decrease in other assets	(67,242)	(29,568)	(35,510)
Increase (Decrease) in Operating Liabilities	5,714	780	(1,661)
Earned stock compensation	32,223	24,363	26,815
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	(400,632)	1,491,004	(137,165)
Net cash provided by operating activities	177,022	249,005	321,115
Net Cash Provided by (Used in) Investing Activities [Abstract]
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	0	0	0
Net Cash Provided by (Used in) Financing Activities [Abstract]
Restricted stock surrendered		(75,369)	(162,965)
Cash dividends paid, net		(159,748)	(289,048)
Net cash provided by (used in) financing activities	(127,948)	(235,117)	(452,013)
Net Cash Provided by (Used in) Continuing Operations	49,074	13,888	(130,898)
Cash and Cash Equivalents, at Carrying Value	$ 176,923	$ 127,849	$ 113,961	$ 244,859