Note 13 - Stockholders' Equity (Detail) - Components of accumulated other comprehensive loss and changes during the year: (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Net unrealized gain on securities available for sale	$ 18,921	$ 11,679
Net unrealized gain on securities available for sale	7,242
Net actuarial loss on pension plans and other postretirement benefits	(7,108)	(7,216)
Net actuarial loss on pension plans and other postretirement benefits	108
Prior service credit on pension plans and other postretirement benefits	324	350
Prior service credit on pension plans and other postretirement benefits	(26)
Accumulated other comprehensive income	12,137	4,813
Accumulated other comprehensive income	$ 7,324

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

+ References+ Details

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

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- Definition

Net of tax amount of the benefit improvement costs resulting from a plan amendment that occurred that has not been recognized in net periodic benefit cost.

+ References

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