Note 12 - Income Taxes (Details) - Effective income tax rate reconciliation: (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Effective income tax rate reconciliation: [Abstract]
Taxes at federal statutory rate (in Dollars)	$ 5,524	$ 4,955	$ 9,400	$ 9,045
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 (in Dollars)	970	835	1,528	1,442
State and local income tax, net of Federal income tax benefit	6.10%	5.90%	5.70%	5.60%
Other (in Dollars)	(339)	(271)	(454)	(410)
Other	(2.10%)	(1.90%)	(1.70%)	(1.60%)
Taxes at effective rate (in Dollars)	$ 6,155	$ 5,519	$ 10,474	$ 10,077
Taxes at effective rate	39.00%	39.00%	39.00%	39.00%