Note 10 - 401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 1.9	$ 1.7	$ 0.6
Deferred Compensation Arrangement with Individual, Employer Contribution	1.9	1.3
Guaranteed Return	5.90%	6.00%
Deferred Compensation Arrangement with Individual, Compensation Expense	1.2	0.9
Deferred Compensation Liability, Classified, Noncurrent	$ 3.6
Minimum [Member]
Deferred Compensation Arrangement with Individual, Requisite Service Period	1 year
Maximum [Member]
Deferred Compensation Arrangement with Individual, Requisite Service Period	7 years