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Note 3 - Share-based Compensation (Detail) - Components of Share-based Compensation (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Stock Options Pretax Compensation Expense [Member]
Pretax compensation expense	$ 424	$ 651	$ 700	$ 975
Stock Options Tax Benefit [Member]
Tax benefit	163	251	269	375
Stock Options Compensation Expense Net [Member]
Expense, net	261	400	431	600
Restricted Share Units Pretax Compensation Expense [Member]
Pretax compensation expense	6,706	4,943	11,933	9,811
Restricted Share Units Tax Benefit [Member]
Tax benefit	2,578	1,903	4,589	3,777
Restricted Share Units Compensation Expense Net [Member]
Expense, net	$ 4,128	$ 3,040	$ 7,344	$ 6,034

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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