Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at December 31, 2011	$ 106,654
Amortization of value of business acquired	(1,674)
Underwriting costs deferred	109,243
Amortization of deferred policy acquisition costs	(103,223)
Ending unamortized deferred policy acquisition costs	111,000
Change in shadow deferred policy acquisition costs	(10,854)	2,527
Recorded asset at September 30, 2012	100,146
Property and Casualty Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at December 31, 2011	60,668
Amortization of value of business acquired	(1,674)
Underwriting costs deferred	104,225
Amortization of deferred policy acquisition costs	(96,681)
Ending unamortized deferred policy acquisition costs	66,538
Change in shadow deferred policy acquisition costs	0
Recorded asset at September 30, 2012	66,538
Life Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at December 31, 2011	45,986
Amortization of value of business acquired	0
Underwriting costs deferred	5,018
Amortization of deferred policy acquisition costs	(6,542)
Ending unamortized deferred policy acquisition costs	44,462
Change in shadow deferred policy acquisition costs	(10,854)
Recorded asset at September 30, 2012	$ 33,608