Note 13 - Income Taxes (Detail) - Reconciliation of Unrecognized Benefits (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Balance	$ 13,765,000	$ 14,511,000
Reductions for statute of limitation expirations	(3,187,000)	(3,992,000)	(3,721,000)
Balance	11,996,000	13,765,000	14,511,000
Deferred Tax Assets [Member]
Balance	9,926,000	10,089,000	11,894,000
Additions for tax positions of prior years	728,000	(70,000)
Reductions for tax positions of prior years			(1,510,000)
Reductions for statute of limitation expirations	(1,999,000)	(93,000)	(295,000)
Balance	8,655,000	9,926,000	10,089,000
Liability For Unrecognized Tax Benefits [Member]
Balance	13,765,000	14,511,000	17,275,000
Additions based on tax positions related to the current year	1,695,000	1,452,000	1,094,000
Additions for tax positions of prior years	845,000	189,000
Reductions for tax positions of prior years			(1,356,000)
Reductions for statute of limitation expirations	(4,309,000)	(2,387,000)	(2,502,000)
Balance	11,996,000	13,765,000	14,511,000
Liability For Interest and Penalties [Member]
Balance	2,479,000	4,350,000	5,358,000
Additions based on tax positions related to the current year	185,000	183,000	144,000
Additions for tax positions of prior years	170,000	(449,000)
Reductions for tax positions of prior years			67,000
Reductions for statute of limitation expirations	(940,000)	(1,605,000)	(1,219,000)
Balance	1,894,000	2,479,000	4,350,000
Total Liability [Member]
Balance	16,244,000	18,861,000	22,633,000
Additions based on tax positions related to the current year	1,880,000	1,635,000	1,238,000
Additions for tax positions of prior years	1,015,000	(260,000)
Reductions for tax positions of prior years			(1,289,000)
Reductions for statute of limitation expirations	(5,249,000)	(3,992,000)	(3,721,000)
Balance	$ 13,890,000	$ 16,244,000	$ 18,861,000