Note 12 - Leases - Maturity Analysis of Operating Lease Liability Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Within one year	$ 5,669
One to three years	10,336
Three to five years	8,641
More than five years	59,638
Total undiscounted cash flows	84,284
Discount on cash flows	(26,634)
Operating Lease, Liability, Total	$ 57,650