Other Income (Loss) (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Other Income (Loss) (Textual) [Abstract]
Foreign currency gains	$ 400,000	$ 0	$ 200,000	$ 100,000
Gains on sales/distributions of ownership interests	12,000	531,000	12,000	531,000
Gain on other distributions		1,424,000		1,424,000
Anthem [Member]
Other Income (Loss) (Textual) [Abstract]
Gain on other distributions		1,400,000		1,400,000
ICG Equity Holdings [Member]
Other Income (Loss) (Textual) [Abstract]
Gains on sales/distributions of ownership interests		$ 500,000		$ 500,000