Nature of Operations and Basis of Presentation (Deferred Policy Acquisition Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	$ 150,092
Underwriting costs deferred	41,658
Amortization of deferred policy acquisition costs	(39,534)
Ending unamortized deferred policy acquisition costs	152,216
Change in shadow deferred policy acquisition costs	(8,920)	4,871
Recorded asset at end of period	143,296
Property and Casualty Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	67,663
Underwriting costs deferred	39,822
Amortization of deferred policy acquisition costs	(37,876)
Ending unamortized deferred policy acquisition costs	69,609
Change in shadow deferred policy acquisition costs	0
Recorded asset at end of period	69,609
Life Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	82,429
Underwriting costs deferred	1,836
Amortization of deferred policy acquisition costs	(1,658)
Ending unamortized deferred policy acquisition costs	82,607
Change in shadow deferred policy acquisition costs	(8,920)
Recorded asset at end of period	$ 73,687