Note 12 - Pension and Other Postretirement Benefit Plans (Detail) - The components of the net pension expense for the Retirement Plan: (Retirement Plan [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Retirement Plan [Member]
Service cost			$ 63
Interest cost	879	919	892
Amortization of unrecognized loss	1,032	639	362
Expected return on plan assets	(1,257)	(1,164)	(1,247)
Net pension expense (benefit)	654	394	70
Current year actuarial (gain) loss	652	3,714	1,468
Amortization of actuarial loss	(1,032)	(639)	(362)
Total recognized in other comprehensive income	(380)	3,075	1,106
Total recognized in net pension cost (benefit) and other
comprehensive income	$ 274	$ 3,469	$ 1,176