Note 6 - 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 Period Increase Decrease			$ 3,700,000
Income Tax Expense (Benefit)	2,791,000	808,000	4,639,000	977,000
Effective Income Tax Rate Reconciliation, Percent			33.32%	10.51%
Unrecognized Tax Benefits	9,500,000		9,500,000		9,600,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	5,800,000		5,800,000		6,000,000
Unrecognized Tax Benefits In Long Term Liabilities	2,900,000		2,900,000
Unrecognized Tax Benefits In Deferred Tax Assets	7,100,000		7,100,000
Unrecognized Tax Benefits In Deferred Tax Asset Subject To Full Valuation Allowance	$ 3,700,000		$ 3,700,000