Note 23 - Revenue From Contracts With Customers - Revenue by Operating Segment (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Mortgage banking income	[1]	$ 1,003	$ 1,444
Bank owned life insurance	[1]	266	161
Other	[2]	972	770
Non-interest income		19,203	13,844
Commercial Banking [Member]
Mortgage banking income	[1]	1,003	1,444
Bank owned life insurance	[1]	266	161
Other	[2]	972	770
Non-interest income		10,734	7,596
WM&T [Member]
Mortgage banking income	[1]	0	0
Bank owned life insurance	[1]	0	0
Other	[2]	0	0
Non-interest income		8,469	6,248
Fiduciary and Trust [Member]
Non-interest income		8,469	6,248
Fiduciary and Trust [Member] | Commercial Banking [Member]
Non-interest income		0	0
Fiduciary and Trust [Member] | WM&T [Member]
Non-interest income		8,469	6,248
Deposit Account [Member]
Non-interest income		1,863	944
Deposit Account [Member] | Commercial Banking [Member]
Non-interest income		1,863	944
Deposit Account [Member] | WM&T [Member]
Non-interest income		0	0
Credit and Debit Card [Member]
Non-interest income		4,119	2,273
Credit and Debit Card [Member] | Commercial Banking [Member]
Non-interest income		4,119	2,273
Credit and Debit Card [Member] | WM&T [Member]
Non-interest income		0	0
Treasury Management [Member]
Non-interest income		1,904	1,540
Treasury Management [Member] | Commercial Banking [Member]
Non-interest income		1,904	1,540
Treasury Management [Member] | WM&T [Member]
Non-interest income		0	0
Product Sales Commissions and Fees [Member]
Non-interest income		607	464
Product Sales Commissions and Fees [Member] | Commercial Banking [Member]
Non-interest income		607	464
Product Sales Commissions and Fees [Member] | WM&T [Member]
Non-interest income		$ 0	$ 0

[1] Outside of the scope of ASC 606.

[2] Outside of the scope of ASC 606, with the exception of safe deposit fees which were nominal for all periods.