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Note G - Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Loss) (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
USD ($)
Balance at December 31, 2016, net of tax of $4,576 $ 7,476
Net other comprehensive (loss) (922)
Balance at March 31, 2017, net of tax of $4,011 6,554
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]  
Balance at December 31, 2016, net of tax of $4,576 7,476
Other comprehensive income before reclassifications, net of tax of $(15) (22)
Amounts reclassified from accumulated other comprehensive income, net of tax of $(551) (900)
Net other comprehensive (loss) (922)
Balance at March 31, 2017, net of tax of $4,011 $ 6,554