Note 10 - Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 19,029,000	$ 17,686,000	$ 52,489,000	$ 50,852,000
Effective Income Tax Rate Reconciliation, Percent			36.50%	36.30%
Income Tax Refund Receivable					$ 12,400,000