Note 15 - Retirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Contribution Plan, Cost Recognized	$ 1,200	$ 1,200	$ 1,740
Employee Stock Ownership Plan (ESOP), Compensation Expense	1,255	1,283	1,377
Defined Benefit Plan, Amortization of Net Transition Asset (Obligation)	$ 61