SCHEDULE II-CONDENSED FINANCIAL INFORMATION OF REGISTRANT (PARENT COMPANY) (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS
Net investment income	$ 13,432	$ 13,598	$ 12,847	$ 12,886	$ 14,491	$ 14,221	$ 14,826	$ 15,293	$ 52,763	$ 58,831	$ 63,681
Net realized investment gains (losses)	3,611	10,999	3,742	3,684	9,139	5,481	(664)	11,416	22,036	25,372	17,036
Equity in earnings of unconsolidated investee									10,915	8,853	6,497
Interest expense on debt									(8,095)	(6,050)	(6,050)
Loss before income taxes	40,812	55,309	43,576	35,969	28,575	36,480	36,568	41,109	175,666	142,732	183,586
Income tax benefit									49,411	39,386	56,988
Net earnings	33,859	37,647	29,902	24,847	25,097	25,463	24,748	28,038	126,255	103,346	126,598
Unrealized gains (losses) on securities:
Other comprehensive earnings (loss)									(7,143)	25,845	21,333
Comprehensive earnings									119,112	129,191	147,931
PARENT COMPANY
CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS
Net investment income									652	837	1,179
Net realized investment gains (losses)									(850)	(2,834)	42
Equity in earnings of unconsolidated investee									10,915	8,853	6,497
Selling, general and administrative expenses									(8,746)	(7,867)	(7,766)
Interest expense on debt									(8,095)	(6,050)	(6,050)
Loss before income taxes									(6,124)	(7,061)	(6,098)
Income tax benefit									(11,946)	(8,071)	(4,949)
Net earnings (loss) before equity in net earnings of subsidiaries									5,822	1,010	(1,149)
Equity in net earnings of subsidiaries									120,433	102,336	127,747
Net earnings									126,255	103,346	126,598
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during the period									(665)	807	277
Less: reclassification adjustment for losses (gains) included in net earnings										(70)	(27)
Other comprehensive income (loss) - parent only									(665)	737	250
Equity in other comprehensive earnings (loss) of subsidiaries/investees									(6,478)	25,108	21,083
Other comprehensive earnings (loss)									(7,143)	25,845	21,333
Comprehensive earnings									$ 119,112	$ 129,191	$ 147,931