Investments (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2008	Aug. 31, 2007
Unrealized gain (loss) on investment under fair value method	$ 800	$ 0
kaleo
Kaleo 2016 Q1 gain on contract termination excluded from other expenses	$ 17,500
Total cash invested in private company				$ 7,500
Ownership interest percentage	19.00%
Carrying value	$ 19,400		$ 18,600
Unrealized gain (loss) on investment under fair value method	$ 800	$ 0
Weighted average cost of capital	45.00%	45.00%
Basis point decrease of weighted average cost of capital assumption	5.00%
Basis point increase of weighted average cost of capital assumption	5.00%
Increase in fair value from five hundred point decrease in weighted average cost of capital assumption	$ 5,000
Decrease in fair value from five hundred point increase in weighted average cost of capital assumption	4,000
Harbinger Fund
Cost Method Investments	1,700		1,700
Alleghany and Bath County, Virginia [Member]
Cost Method Investments	$ 2,600		$ 2,600