Note 14 - Change In Accounting Estimate (Detail) - Reduction of Depreciation Expense Resulted from Changes In Accounting Estimate (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Three Months Ended
Pre-tax Basis	$ 561	$ 606	$ 1,703	$ 1,011
Net of Tax	$ 346	$ 374	$ 1,050	$ 623
Per Share Effect (in Dollars per share)	$ 0.03	$ 0.04	$ 0.10	$ 0.06