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Note 6 - Income Taxes (Detail) - Summary reconciliation reported amount of income tax expense to the amount of income tax expense under federal statutory tax rates: (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Tax expense at the federal statutory rate (in Dollars)     $ 1,698 $ 3,180
Tax expense at the federal statutory rate     35.00% 35.00%
State income tax expense (benefit), net of federal benefit (in Dollars)     9 (444)
State income tax expense (benefit), net of federal benefit     0.20% (4.90%)
Taxes on subsidiaries' and joint ventures’ earnings attributable to noncontrolling ownership interests, which are liabilities of such owners (in Dollars)     (4,213) (1,232)
Taxes on subsidiaries' and joint ventures’ earnings attributable to noncontrolling ownership interests, which are liabilities of such owners     (86.80%) (13.60%)
Interest income not subject to federal tax     (235.00%) (210.00%)
Interest income not subject to federal tax     (4.80%) (2.30%)
Other permanent differences     (251.00%) 17.00%
Other permanent differences     (5.30%) 0.20%
Income tax expense (in Dollars) $ 984 $ 1,145 $ (2,992) $ 1,311
Income tax expense     (61.70%) 14.40%