Note 22 - Leases - Balance Sheet, Income Statement, and Cash Flow Detail Regarding Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
Operating lease right-of-use assets	$ 16,392		$ 17,000
Operating lease liabilities	$ 17,713		18,000
Weighted average remaining lease term (years) (Year)	12 years 102 days
Weighted average discount rate	3.61%
Maturities of lease liabilities:
Year 1	$ 1,953
Year 2	1,940
Year 3	1,918
Year 4	1,942
Year 5	1,974
Thereafter	12,323
Total lease payments	22,050
Less imputed interest	4,337
Operating lease liabilities	17,713		$ 18,000
Components of lease expense
Operating lease cost	508
Variable lease cost	39
Less sublease income	14
Total lease cost	533
Supplemental cash flow information:
Operating cash flows from operating leases	$ 354