Note 10 - Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Note 10 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)	$ 22,675	$ 21,364
Effective Income Tax Rate Reconciliation, Percent	32.90%	37.30%
Income Taxes Receivable			$ 28,900
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Note 10 - Income Taxes (Details) [Line Items]
Open Tax Year	2012
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Earliest Tax Year [Member]
Note 10 - Income Taxes (Details) [Line Items]
Open Tax Year	2008