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Investments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2008	Aug. 31, 2007
Unrealized gain (loss) on investment under fair value method			$ (200)	$ 0
Gain (Loss) on Disposition of Assets			0	(11)
kaleo
Kaleo 2016 Q1 gain on contract termination excluded from other expenses	$ 18,700		$ 35,700
Total cash invested in private company						$ 7,500
Ownership interest percentage			19.00%
Carrying value	18,400		$ 18,400		$ 18,600
Unrealized gain (loss) on investment under fair value method	$ (1,300)	$ 0	$ (200)	$ 0
Weighted average cost of capital			45.00%	45.00%
Basis point decrease of weighted average cost of capital assumption	5.00%		5.00%
Basis point increase of weighted average cost of capital assumption	5.00%		5.00%
Increase in fair value from five hundred point decrease in weighted average cost of capital assumption	$ 5,000		$ 5,000
Decrease in fair value from five hundred point increase in weighted average cost of capital assumption	4,000		4,000
Harbinger Fund
Total withdrawal proceeds received				$ 100
Cost Method Investments	1,700		1,700		1,700
Alleghany and Bath County, Virginia [Member]
Cost Method Investments	$ 2,600		$ 2,600		$ 2,600

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