Note 6 - Other Comprehensive Income (Detail) - Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Securities available for sale:
Realized gains on securities transactions	$ 132	$ 879
Income taxes	(59)	(391)
Net of tax	73	488
Amortization of pension and post-retirement benefit items:
Amortization of net actuarial losses	(1,023)	(816)
Amortization of prior service cost	(10)	(10)
Income taxes	460	368
Net of tax	(573)	(458)
Total reclassifications, net of tax	$ (500)	$ 30