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Statements of Cash Flow (Cash Flow Supplemental Disclosures) (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
Interest		$ 10,947	$ 11,113
Federal income tax		8,500	3,699
Corporate Actions Related To Equity Securities, AFS	[1]	884	334
Assets acquired under capital lease arrangements		3,478	2,124
AFS Fixed Maturity Securities [Member]
Tax-free exchange of fixed maturity security		17,120	9,180
Held-to-maturity Securities [Member]
Tax-free exchange of fixed maturity security		0	15
National Flood Insurance Program [Member]
Restricted Cash		$ 5,200	$ 8,500
[1] 1Examples of such corporate actions include non-cash acquisitions and stock splits.

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The increase during the period in capital lease obligations due to entering into new capital leases.

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