Long Term Investments Equity Method Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 8,595	$ 6,432
Equity Method Investments [Roll Forward]
Reduction in partnership interest now accounted for under the cost method	0	(15,541)
Equity loss on long-term investments accounted for under the equity method	22,925	29,764	19,966
Hedge Funds [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	8,595	6,432
Equity Method Investments [Roll Forward]
Equity Method Investments, Beginning Balance	6,432	16,499
Contributions	0	5,000
Reduction in partnership interest now accounted for under the cost method	0	(15,541)
Equity loss on long-term investments accounted for under the equity method	2,066	(1,261)
Unrealized gains reclassified into net income	97	0
Unrealized (loss) gain on long-term investments	0	1,735
Net change in long-term investments	97	1,735
Equity Method Investments, Ending Balance	$ 8,595	$ 6,432