Note 10 - Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 20,741,000	$ 16,573,000	$ 38,631,000	$ 33,460,000
Effective Income Tax Rate Reconciliation, Percent			36.80%	36.30%
Income Tax Refund Receivable					$ 8,600,000