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Note 13 - Income Taxes (Details) - Effective Income Tax Rate Reconciliation - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Effective Income Tax Rate Reconciliation [Abstract]        
Taxes at federal statutory rate $ 8,524 $ 6,749 $ 13,522 $ 12,777
Taxes at federal statutory rate 35.00% 35.00% 35.00% 35.00%
Increase (reduction) in taxes resulting from:        
State and local income tax, net of Federal income tax benefit $ 1,538 $ 1,355 $ 2,379 $ 2,765
State and local income tax, net of Federal income tax benefit 6.30% 7.00% 6.20% 7.60%
Other $ (541) $ (506) $ (834) $ (1,017)
Other (2.20%) (2.60%) (2.20%) (2.80%)
Taxes at effective rate $ 9,521 $ 7,598 $ 15,067 $ 14,525
Taxes at effective rate 39.10% 39.40% 39.00% 39.80%