Note G - Bank Lines of Credit and Other Debt (Detail) - Summary of Long-Term Debt Outstanding (Parentheticals) In Thousands, unless otherwise specified					12 Months Ended
	Dec. 31, 2012 Secured Fixed Rate Term Loans Borrowing Limits in Euros [Member] EUR (€)	Dec. 31, 2011 Secured Fixed Rate Term Loans Borrowing Limits in Euros [Member] EUR (€)	Dec. 31, 2012 Secured Fixed Rate Term Loans Borrowing Limits in US Dollars [Member] USD ($)	Dec. 31, 2011 Secured Fixed Rate Term Loans Borrowing Limits in US Dollars [Member] USD ($)	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2011 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2011 Maximum [Member]
Secured Fixed Rate Term Loan Borrowing Capacity	€ 800	€ 1,320	$ 1,058	$ 1,710
Secured Fixed Rate Term Loan Interest Rate Minimum					5.42%	5.42%
Secured Fixed Rate Term Loan Interest Rate Maximum							5.42%	5.84%
Secured Fixed Rate Term Loan Minimum Maturity Date					Feb. 28, 2013	Feb. 29, 2012
Secured Fixed Rate Term Loan Maximum Maturity Date							Feb. 28, 2013	Feb. 28, 2013