Note 9 - Marketable Securities and Other Investments (Detail) (USD $)	Jun. 30, 2012		Dec. 31, 2011
Marketable Securities	$ 34,439,000	[1]	$ 33,540,000	[1]
Available-for-sale Securities, Gross Unrealized Gains	$ 17,100,000

[1] As of June 30, 2012, $31.3 million of these assets were classified within Level 1 of the fair value hierarchy and the remaining $3.4 million were classified within Level 3 of the fair value hierarchy.