Note 11 - Income Taxes (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 4,952,000		$ 4,134,000		$ 9,401,000	$ 7,244,000
Effective Income Tax Rate Reconciliation, Percent	31.10%	3.00%	32.40%		30.90%	30.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					35.00%
Income Tax Credits and Adjustments				300,000
Unrecognized Tax Benefits	700,000				700,000		700,000
Unrecognized Tax Benefits, Period Increase (Decrease)					$ 0