Note F - Treasury Stock (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Disclosure Text Block Supplement [Abstract]
Treasury Stock, Shares	2,730,825	2,682,600
Treasury Stock, Value (in Dollars)	$ 37,709,000	$ 37,239,000
Treasury Stock, Shares, Acquired	48,225
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$ 470,000