Note 6 - Other Assets and Other Liabilities - Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Net deferred tax liability	$ 17,821	$ 0
Operating lease liability	15,757	17,136
Securities purchases pending settlement	13,632	0
Other liabilities	54,021	27,453
Total other liabilities	$ 101,231	$ 44,589