Note E - Goodwill and Other Intangible Assets (Details) - Changes in Carrying Amount of Goodwill (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Ironworks [Member]	Dec. 31, 2013 GHK [Member]	Dec. 31, 2012 GHK [Member]	Dec. 31, 2012 Symbiotic Engineering [Member]	Dec. 31, 2013 ECA [Member]
Goodwill [Line Items]
Balance as of January 1	$ 418,839	$ 410,583	$ 401,134
Goodwill acquired during period				119	(101)	7,857	1,473	8,357
Balance as of December 31	$ 418,839	$ 410,583	$ 401,134