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Long Term Investments Cost Method Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cost Method Investments [Roll Forward]
Cost Method Investments, Beginning Balance	$ 7,492	$ 72,102
Distributions	(207)	(66,190)
Reduction in partnership interest now accounted for under the cost method	15,541	0
Revision for partnership now accounted for as investment securities available for sale	(6,122)	0
Realized gain on liquidation of long-term investments	135	25,832
Unrealized gains reclassified into net income	(135)	(25,832)
Unrealized gain on long-term investments	1,649	1,580
Net change in long-term investments	1,514	(24,252)
Cost Method Investments, Ending Balance	$ 18,353	$ 7,492

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the cost method of accounting as of the balance sheet date.

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