This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting.

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The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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Investments (Summary of Realized Gain (Loss) on Investments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Investments [Line Items]
Gain (loss) on investments	$ 1,105	$ 28	$ 1,589	$ 5,881
Other-than-temporary impairment		(363)	(2,888)	(2,193)
Net realized (losses) gains	1,105	(335)	(1,299)	3,688
Us Treasury Securities and Obligations of U.S. Government [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments
Corporate Bonds [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	(81)		(1)
Collateralized Corporate Bank Loans [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	(98)	8	(116)	158
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	(97)	(12)	(165)	(54)
Mortgage Backed [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	(1)		(1)	240
Equity Securities [Member]
Schedule of Investments [Line Items]
Gain (loss) on investments	$ 1,382	$ 32	$ 1,872	$ 5,537