Note 8 - Income Taxes (Details) - Reconciliation of Income Tax Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Income Tax Expense [Abstract]
Statutory federal rate applied to income before income tax expense	$ 11,002	$ 16,561	$ 4,751
Current year permanent items	669	825	229
State and local taxes, net of federal tax benefit	1,432	4,191	710
Change in valuation allowance	(409)	(1,463)	(252)
Reserve for uncertain tax positions	(136)	(1,015)	(905)
Other items, net	589	89	6
Income tax expense as recorded	$ 13,147	$ 19,188	$ 4,539
Effective income tax rate	41.80%	40.60%	33.40%