Note F - Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) as Reported in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	3 Months Ended		15 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016
Currency Translation Adjustments [Member]
Balance	$ (9,057)	$ (4,338)	$ (4,338)
Reclassification adjustments
Current period charge	$ 1,500	$ (2,836)
Income tax expense
Balance	(7,557)	$ (7,174)	$ (7,557)
Pension And O P E B Adjustments [Member]
Balance	(13,358)	(12,988)	(12,988)
Reclassification adjustments	351	$ 355
Current period charge	42
Income tax expense		$ (129)	(143)
Balance	(13,108)	(12,762)	(13,108)
Accumulated Other Comprehensive Income Loss [Member]
Balance	(22,415)	(17,326)	(17,326)
Reclassification adjustments	351	355
Current period charge	1,542	(2,836)
Income tax expense		(129)	(143)
Balance	(20,665)	$ (19,936)	(20,665)
Balance	(22,415)
Balance	$ (20,665)		$ (20,665)