Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Net investment income									$ 125,723	$ 124,538	$ 131,896
Net realized investment gains (losses)									81,184	(11,422)	66,380
Total revenues									(3,011,773)	(2,821,041)	(2,783,370)
Expenses:
Other operating expenses									249,381	219,478	207,281
Other operating expenses									2,637	1,260	1,543
Total expenses									2,764,348	2,688,945	2,648,060
Income before income taxes	28,161	(37,120)	(136,436)	(102,030)	(11,268)	(54,793)	24,959	(90,994)	(247,425)	(132,096)	(135,310)
Income tax (benefit) expense									69,476	19,953	18,399
Net income	(20,956)	31,296	94,960	72,649	15,376	39,570	(9,264)	66,461	177,949	112,143	116,911
Parent Company [Member]
Revenues:
Net investment income									4,478	1,293	1,114
Net realized investment gains (losses)									(9,428)	3,416	697
Total revenues									(4,950)	(4,709)	(1,811)
Expenses:
Other operating expenses									5,971	2,924	1,688
Other operating expenses									1,746	318	0
Total expenses									7,717	3,242	1,688
Income before income taxes									(12,667)	(1,467)	(123)
Income tax (benefit) expense									(100)	3,310	1,800
Loss before equity in net income of subsidiaries									(12,567)	(1,843)	(1,677)
Equity in net income of subsidiaries									190,516	113,986	118,588
Net income									$ 177,949	$ 112,143	$ 116,911