Investments (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net realized gain	$ 2,189	$ 3,633	$ 8,402
Other-than-temporary impairments	(246)	0	0
Gain on investments	1,943	3,633	8,402
US Treasury Securities and Obligation [Member]
Net realized gain	0	35	0
Corporate Bond Securities [Member]
Net realized gain	13	300	2,026
Collateralized Corporate Bank Loans [Member]
Net realized gain	391	699	2,170
Municipal Bonds [Member]
Net realized gain	(441)	(500)	(86)
Equity Securities Financial Services [Member]
Net realized gain	84	2,029	2,858
Equity Securities, Other [Member]
Net realized gain	$ 2,142	$ 1,070	$ 1,434

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 amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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