Investments (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2008	Aug. 31, 2007
Unrealized gain (loss) on investment under fair value method			$ (1,100,000)	$ 3,200,000
Cost-method investment, OTTI	0	1,018,000	0	1,018,000
Gain (Loss) on Disposition of Assets			837,000	0
kaleo
Total cash invested in private company						7,500,000
Ownership interest percentage			20.00%
Carrying value	36,000,000		36,000,000		37,100,000
Unrealized gain (loss) on investment under fair value method	(1,100,000)	2,100,000	(1,100,000)	3,200,000
Weighted average cost of capital		55.00%	45.00%		55.00%
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	7,000,000		7,000,000
Decrease in fair value from five hundred point increase in weighted average cost of capital assumption	5,000,000		5,000,000
Harbinger Fund
Cost-method investment, OTTI	300,000		600,000
Total withdrawal proceeds received	200,000		200,000
Cost Method Investments	2,000,000		2,000,000		2,800,000
Alleghany and Bath County, Virginia [Member]
Gain (Loss) on Disposition of Assets	1,208,000		1,208,000
Gain (Loss) on Sale of Investment Property, After Tax	800,000	(600,000)
Unrealized Gain (Loss) on Investment Property		(1,000,000)
Cost Method Investments	$ 2,600,000		$ 2,600,000		$ 5,900,000