Note 13 - Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Tax Benefit from Stock Options Exercised	$ (267,000)	$ (52,000)	$ 154,000
Unrecognized Tax Benefits, Period Increase (Decrease)	(4,309,000)	(2,387,000)	(2,502,000)
Deferred Tax Assets, Other	1,999,000
Entity Not Subject to Income Taxes, Difference in Bases, Amount	2,310,000	2,387,000
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(3,187,000)	(3,992,000)	(3,721,000)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,187,000	3,992,000	3,721,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,894,000	2,479,000	4,350,000
Unrecognized Tax Benefits	11,996,000	13,765,000	14,511,000
Deferred Tax Assets, Net	8,292,000	9,308,000	9,048,000
Unrecognized Tax Benefit, Permanent Differences	3,704,000	4,457,000	5,463,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	1,531,000		1,931,000
Deferred Tax Liability Not Recognized, Cumulative Amount of Temporary Difference		0
Income Tax Examination, Penalties and Interest Expense	(585,000)	(1,871,000)	(1,008,000)
Scenario, Forecast [Member]
Unrecognized Tax Benefits, Period Increase (Decrease)	(2,707,000)
Entity Not Subject to Income Taxes, Difference in Bases, Amount	985,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	602,000
Deferred Tax Liability Not Recognized, Cumulative Amount of Temporary Difference	1,722,000
Interest and Penalties [Member]
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	940,000	1,605,000	1,219,000
Permanent Differences [Member] | Favorable Impact on Tax Provision [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	707,000
Permanent Differences [Member]
Unrecognized Tax Benefits, Period Increase (Decrease)			(2,502,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		1,650,000
Temporary Differences [Member] | Favorable Impact on Tax Provision [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	170,000
Temporary Differences [Member]
Unrecognized Tax Benefits, Period Increase (Decrease)			0
Favorable Impact on Tax Provision [Member]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 1,605,000	$ 1,219,000