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		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Three Months Ended
Pre-tax Basis	$ 568	$ 402	$ 1,141	$ 402
Net of Tax	$ 350	$ 248	$ 704	$ 248
Per Share Effect (in Dollars per share)	$ 0.03	$ 0.02	$ 0.07	$ 0.02