Investments (Details) (USD $)	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Specialty Pharmaceutical Company [Member]	Sep. 30, 2012 Specialty Pharmaceutical Company [Member]	Dec. 31, 2011 Specialty Pharmaceutical Company [Member]	Mar. 31, 2012 Harbinger Fund [Member]	Sep. 30, 2012 Harbinger Fund [Member]	Dec. 31, 2011 Harbinger Fund [Member]
Total cash invested in private company		$ 7,500,000	$ 7,500,000
Ownership interest percentage			20.00%
Carrying value		26,600,000	26,600,000	17,600,000
Unrealized gain (loss) on investment under fair value method	9,000,000	2,700,000	9,000,000
Percentage of discount on cash flows due to high degree of risk	55.00%
Weighted average cost of capital		55.00%	55.00%	60.00%
Basis point decrease of weighted average cost of capital assumption		500	500
Basis point increase of weighted average cost of capital assumption		500	500
Increase in fair value from five hundred point decrease in weighted average cost of capital assumption		5,100,000	5,100,000
Decrease in fair value from five hundred point increase in weighted average cost of capital assumption		5,900,000	5,900,000
Carrying value of investment						3,600,000	5,200,000
Cost-method investment, OTTI					1,100,000
Cost-method investment, OTTI net of tax					700,000
Total withdrawal proceeds received	$ 500,000