Note 3 - Investment in Joint Ventures (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended			9 Months Ended
	Feb. 29, 2012	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Equity Method Investment, Additional Information	20 percent
Proceeds From Sale Of InterestIn Joint Venture	$ 9,103				$ (9,103)
Gain Loss On Sale Of Interest In Joint Venture			4,055		4,055
Related Party Transaction, Amounts of Transaction		9,697		19,640	40,331	51,477
Equity Method Investment Summarized Financial Information Depreciation And Amortization		$ 1,259		$ 1,375	$ 3,778	$ 3,958