Note 10 - Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 22,313,000	$ 19,029,000	$ 60,944,000	$ 52,489,000
Effective Income Tax Rate Reconciliation, Percent			37.30%	36.50%
Income Tax Refund Receivable					$ 8,600,000