Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 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	73,250
Amortization of deferred policy acquisition costs	(67,056)
Ending unamortized deferred policy acquisition costs	111,174
Change in shadow deferred policy acquisition costs	(4,116)	(257)
Recorded asset at June 30, 2012	107,058
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	69,742
Amortization of deferred policy acquisition costs	(62,621)
Ending unamortized deferred policy acquisition costs	66,115
Change in shadow deferred policy acquisition costs	0
Recorded asset at June 30, 2012	66,115
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	3,508
Amortization of deferred policy acquisition costs	(4,435)
Ending unamortized deferred policy acquisition costs	45,059
Change in shadow deferred policy acquisition costs	(4,116)
Recorded asset at June 30, 2012	$ 40,943