Note 1 - General (Details) - Business Acquisitions - Initial Purchase Price Allocation In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013 EUR (€)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Jun. 30, 2013 Brinderson LP [Member] USD ($)	Jun. 30, 2014 Brinderson LP [Member] USD ($)
Note 1 - General - Business Acquisitions - Initial Purchase Price Allocation [Line Items]
Cash							$ 3,842
Receivables and cost and estimated earnings in excess of billings							28,353
Prepaid expenses and other current assets							655
Property, plant and equipment							6,848
Identified intangible assets							60,210
Other assets							1,071
Accounts payable, accrued expenses and billings in excess of cost and estimated earnings							(30,622)
Total consideration recorded	18,300	14,000	0	(18,300)		147,600	147,605
Total identifiable net assets							70,357
Goodwill at March 31, 2014			$ 349,912		$ 348,680		$ 77,248