Note G - Accumulated Other Comprehensive Income - Reclassification Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
NON-OPERATING INCOME (EXPENSE)	[1]				$ 876
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
NON-OPERATING INCOME (EXPENSE)	[1]				(709)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Total before tax	[1]				167
Tax expense	[1]				(64)
NET INCOME	[1]				103
NON-OPERATING INCOME (EXPENSE)		$ 1,235	$ (732)		1,203	$ 385
Total before tax		5,603	9,362		16,779	29,647
Tax expense		(2,152)	(3,567)		(6,401)	(11,444)
NET INCOME		$ 3,451	$ 5,795	$ 10,378	$ 10,378	$ 18,203

[1] Amounts in parentheses indicate debits to profit/loss