Note 6 - Derivative Instruments - Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Derivative, Pre-tax gain (loss) recognized in OCI	$ (4,667)	$ (7,973)
Foreign Exchange Forward [Member]
Derivative, Pre-tax gain (loss) recognized in OCI	204	(159)
Interest Rate Swap [Member]
Derivative, Pre-tax gain (loss) recognized in OCI	$ (4,871)	$ (7,814)