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Note 7 - Income Taxes (Details) - 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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Summary Reconciliation Reported Amount of Income Tax Expense to the Amount Of Income Tax Expense Under Federal Statutory Tax Rates [Abstract]        
Tax expense (benefit) at the U.S. federal statutory rate     $ 1,033 $ (11,614)
Tax expense (benefit) at the U.S. federal statutory rate     35.00% 35.00%
State franchise and income tax based on income, net of refunds and federal benefits     13 (437)
State franchise and income tax based on income, net of refunds and federal benefits     0.40% 1.30%
Taxes on subsidiaries’ and joint ventures’ earnings allocated to noncontrolling ownership interests     (1,113) (342)
Taxes on subsidiaries’ and joint ventures’ earnings allocated to noncontrolling ownership interests     (37.70%) 1.00%
Valuation allowance     104  
Valuation allowance     3.50%  
Non-taxable interest income       (155)
Non-taxable interest income       0.50%
Other permanent differences     (9) 1
Other permanent differences     (0.30%)  
Income tax expense (benefit) $ 28 $ (9,747) $ 28 $ (12,547)
Income tax expense (benefit)     0.90% 37.80%