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Note 12 - Fair Value Measurements and Derivatives (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Payments for (Proceeds from) Derivative Instrument, Investing Activities, Total $ 3,000 $ 20,000  
Interest Rate Swap [Member]      
Derivative, Notional Amount 0    
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge 5,000    
Interest Rate Contract [Member] | Cash Flow Hedging [Member]      
Derivative, Notional Amount 425,000    
Foreign Exchange Forward [Member]      
Derivative, Notional Amount $ 355,000   $ 508,000
Maximum Remaining Maturity of Foreign Currency Derivatives (Month) 15 months    
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]      
Derivative, Notional Amount $ 130,000    
Foreign Exchange Forward [Member] | Oerlikon Drive Systems [Member] | Not Designated as Hedging Instrument [Member]      
Payments for (Proceeds from) Derivative Instrument, Investing Activities, Total   21,000  
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments   $ (13,000)  
Currency Swap [Member]      
Derivative, Notional Amount 1,085,000   $ 1,090,000
Currency Swap [Member] | Not Designated as Hedging Instrument [Member]      
Derivative, Notional Amount $ 0