Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Net investment income	$ 129,727	$ 134,858	$ 141,263
Net realized investment gains	111,658	85,731	222,793
Other	10,024	8,287	9,044
Total revenues	3,993,357	3,784,511	3,972,518
Expenses:
Other operating expenses	283,397	285,831	269,305
Interest	17,113	17,048	17,035
Total expenses	3,694,050	3,326,010	3,594,449
Income before income taxes	299,307	458,501	378,069
Income tax expense	51,370	83,894	57,982
Net income	247,937	374,607	320,087
Parent Company
Revenues:
Net investment income	2,560	3,323	3,735
Net realized investment gains	26,523	9,575	31,682
Other	0	0	5
Total revenues	29,083	12,898	35,422
Expenses:
Other operating expenses	2,627	3,054	2,592
Interest	17,088	17,035	17,036
Total expenses	19,715	20,089	19,628
Income before income taxes	9,368	(7,191)	15,794
Income tax expense	4,930	600	2,816
Income (loss) before equity in net income of subsidiaries	4,438	(7,791)	12,978
Equity in net income of subsidiaries	243,499	382,398	307,109
Net income	$ 247,937	$ 374,607	$ 320,087