Note M - Earnings Per Share (Details) - Dilutive Effect of Stock Options and Awards In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Dilutive Effect of Stock Options and Awards [Abstract]
Basic weighted-average shares outstanding									19,755	19,663	19,684
Effect of potential exercise of stock options and unvested restricted stock and RSUs									431	294	244
Diluted weighted-average shares outstanding	20,233	20,165	19,996	19,875	19,690	19,770	19,971	20,082	20,186	19,957	19,928