Investments (Schedule of Components of Other Comprehensive Income and Reclassification Out of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) Rollforward
Beginning balance	$ 3,963	$ 6,050	$ 4,131	$ 13,622
Other comprehensive income (loss) before reclassifications	(45)	178	(213)	(1,533)
Amounts reclassified from accumulated other comprehensive income by statement of operations line item:
Realized gains reclassified from accumulated other comprehensive income to net realized and unrealized gains (losses) on investments		(1,319)		(7,180)
Net current-period other comprehensive loss		(1,141)		(8,713)
Ending balance	3,918	4,909	3,918	4,909
Investments in other ventures
Accumulated Other Comprehensive Income (Loss) Rollforward
Beginning balance	160	120	163	1,625
Other comprehensive income (loss) before reclassifications	51	98	48	(1,407)
Amounts reclassified from accumulated other comprehensive income by statement of operations line item:
Realized gains reclassified from accumulated other comprehensive income to net realized and unrealized gains (losses) on investments		0		0
Net current-period other comprehensive loss		98		(1,407)
Ending balance	211	218	211	218
Fixed maturity investments available for sale
Accumulated Other Comprehensive Income (Loss) Rollforward
Beginning balance	3,803	5,930	3,968	11,997
Other comprehensive income (loss) before reclassifications	(96)	80	(261)	(126)
Amounts reclassified from accumulated other comprehensive income by statement of operations line item:
Realized gains reclassified from accumulated other comprehensive income to net realized and unrealized gains (losses) on investments		(1,319)		(7,180)
Net current-period other comprehensive loss		(1,239)		(7,306)
Ending balance	$ 3,707	$ 4,691	$ 3,707	$ 4,691

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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