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Investments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014 Other invested assets [Member]	Sep. 30, 2014 Minimum [Member] Investments with redemption restrictions [Member]	Sep. 30, 2014 Minimum [Member] Investments without redemption restrictions [Member] Hedge Funds [Member]	Sep. 30, 2014 Maximum [Member] Investments with redemption restrictions [Member]	Sep. 30, 2014 Maximum [Member] Investments without redemption restrictions [Member] Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption notice period			30 days
Redemption restriction period		1 year		3 years
Gate trigger, percentage			15.00%		25.00%
Loss on equity method investments	$ 9,348

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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