Note 1 - General (Details) - Business Acquisitions - Initial Purchase Price Allocation In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013 EUR (€)	Sep. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2013 Brinderson LP [Member] USD ($)	Sep. 30, 2013 Fyfe Asia [Member] USD ($)	Dec. 31, 2012 Fyfe Asia [Member] USD ($)
Note 1 - General - Business Acquisitions - Initial Purchase Price Allocation [Line Items]
Cash					$ 3,842	$ 1,303
Receivables and cost and estimated earnings in excess of billings					28,353	9,022
Prepaid expenses and other current assets					655	1,262
Property, plant and equipment					6,848	938
Identified intangible assets					60,210	14,130
Other assets					1,071	0
Accounts payable, accrued expenses and billings in excess of cost and estimated earnings					(16,072)	(4,109)
Deferred tax liabilities					0	(2,410)
Total consideration recorded	18,300	14,000			147,605	40,144
Total identifiable net assets					84,907	20,136	20,342
Goodwill at September 30, 2013			$ 334,416	$ 272,294	$ 62,698	$ 20,008	$ 19,802