Note 18 - Income Taxes - Balance Sheet Presentation of Deferred Taxes (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Non-current deferred tax assets		$ 113,760	$ 57,337
Non-current deferred tax liabilities		(61,323)	(61,961)	(36,411)
Non-current deferred tax assets, net		52,437
Non-current deferred tax liabilities, net			(4,624)	(36,411)
Uncertain tax benefit offset (1)	[1]	(95)	(95)
		$ 52,342	$ (4,719)	$ (36,411)

[1] The non-current deferred tax asset has been reduced by the uncertain tax benefit of $0.1 million in accordance with ASU 2013-11, Income Taxes.