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Note E - Accumulated Other Comprehensive Income (Loss) (Details) - Components of Accumulated Other Comprehensive Loss as Reported in the Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Currency Translation Adjustments [Member]	Mar. 31, 2013 Currency Translation Adjustments [Member]	Mar. 31, 2014 Pension And OPEB Adjustments [Member]	Mar. 31, 2013 Pension And OPEB Adjustments [Member]	Mar. 31, 2014 Accumulated Other Comprehensive Income (Loss) [Member]	Mar. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member]
Note E - Accumulated Other Comprehensive Income (Loss) (Details) - Components of Accumulated Other Comprehensive Loss as Reported in the Consolidated Balance Sheets [Line Items]
Balance	$ (8,643)	$ (8,461)	$ (1,062)	$ 319	$ (7,399)	$ (16,601)	$ (8,461)	$ (16,282)
Current period credit (charge)			(356)	(833)	261	1,817	(95)	984
Income tax benefit (charge)					(87)	(608)	(87)	(608)
Balance	$ (8,643)	$ (8,461)	$ (1,418)	$ (514)	$ (7,225)	$ (15,392)	$ (8,643)	$ (15,906)

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.

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