Note 9 - Allowance for Loan Losses and Credit Quality Information - Deferred Loans (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Deferred loans	$ 78,639
Commercial Real Estate Portfolio Segment [Member]
Deferred loans	75,764
Commercial Real Estate Portfolio Segment [Member] | Hotels [Member]
Deferred loans	48,410
Commercial Real Estate Portfolio Segment [Member] | Theaters [Member]
Deferred loans	9,619
Commercial Real Estate Portfolio Segment [Member] | Restaurant/Bar [Member]
Deferred loans	3,974
Commercial Real Estate Portfolio Segment [Member] | Retail/Office [Member]
Deferred loans	4,623
Commercial Real Estate Portfolio Segment [Member] | Other Industry Sectors [Member]
Deferred loans	9,138
Consumer Portfolio Segment [Member]
Deferred loans	2,875
Consumer Portfolio Segment [Member] | Residential Real Estate [Member]
Deferred loans	2,575
Consumer Portfolio Segment [Member] | Other Consumer [Member]
Deferred loans	$ 300