Note 13 - Income Taxes (Detail) - Income Tax Expense (Benefits) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current provision-
Federal	$ 8,647	$ 3,081	$ 3,850
State	1,917	3,203	1,965
	10,564	6,284	5,815
Deferred provision-
Federal	25,752	27,495	9,962
State	2,412	1,185	253
	28,164	28,680	10,215
Provision (benefit) for income taxes	$ 38,728	$ 34,964	$ 16,030