Note 10 - Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 16,573,000	$ 16,619,000	$ 33,460,000	$ 33,166,000
Effective Income Tax Rate Reconciliation, Percent			36.30%	36.10%
Income Tax Refund Receivable					$ 12,400,000