Note 4 - Loans/Leases Receivable - Leases By Delinquency Status (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Loans and leases		$ 3,681,346	$ 3,723,630
Nonperforming Financial Instruments [Member]
Loans and leases		8,914	18,551
Commercial Portfolio Segment [Member]
Loans and leases		1,507,825	1,429,410
Commercial Portfolio Segment [Member] | Delinquency Status [Member]
Loans and leases	[1]	141,978	103,404
Commercial Portfolio Segment [Member] | Performing Less Than Ninety Days Past Due [Member}
Loans and leases	[1]	140,992	102,713
Commercial Portfolio Segment [Member] | Non Performing Greater Than Ninety Days Past Due [Member]
Loans and leases	[1]	986	691
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and leases		1,882	4,931
Finance Leases Portfolio Segment [Member]
Loans and leases		87,869	117,969
Finance Leases Portfolio Segment [Member] | Delinquency Status [Member]
Loans and leases	[1]	87,869	117,969
Finance Leases Portfolio Segment [Member] | Performing Less Than Ninety Days Past Due [Member}
Loans and leases	[1]	86,019	116,097
Finance Leases Portfolio Segment [Member] | Non Performing Greater Than Ninety Days Past Due [Member]
Loans and leases	[1]	1,850	1,872
Finance Leases Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and leases		1,850	1,872
Residential Portfolio Segment [Member]
Loans and leases	[2]	239,904	290,759
Residential Portfolio Segment [Member] | Delinquency Status [Member]
Loans and leases	[1]	239,904	290,759
Residential Portfolio Segment [Member] | Performing Less Than Ninety Days Past Due [Member}
Loans and leases	[1]	239,198	288,827
Residential Portfolio Segment [Member] | Non Performing Greater Than Ninety Days Past Due [Member]
Loans and leases	[1]	706	1,932
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and leases		706	1,932
Consumer Portfolio Segment [Member]
Loans and leases		109,352	119,381
Consumer Portfolio Segment [Member] | Delinquency Status [Member]
Loans and leases	[1]	109,352	119,381
Consumer Portfolio Segment [Member] | Performing Less Than Ninety Days Past Due [Member}
Loans and leases	[1]	108,763	118,714
Consumer Portfolio Segment [Member] | Non Performing Greater Than Ninety Days Past Due [Member]
Loans and leases	[1]	589	667
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and leases		589	667
Lease Residential and Consumer Portfolio Segments [Member] | Delinquency Status [Member]
Loans and leases	[1]	$ 579,103	$ 631,513
As a % of Total	[1]	100.00%	100.00%
Lease Residential and Consumer Portfolio Segments [Member] | Performing Less Than Ninety Days Past Due [Member}
Loans and leases	[1]	$ 574,972	$ 626,351
As a % of Total	[1]	99.29%	99.18%
Lease Residential and Consumer Portfolio Segments [Member] | Non Performing Greater Than Ninety Days Past Due [Member]
Loans and leases	[1]	$ 4,131	$ 5,162
As a % of Total	[1]	0.71%	0.82%

[1] Performing = loans/leases accruing and less than 90 days past due. Nonperforming = loans/leases on nonaccrual, accruing loans/leases that are greater than or equal to 90 days past due, and accruing troubled debt restructurings.

[2] Includes residential real estate loans held for sale totaling $3.7 million and $1.3 million as of December 31, 2019 and 2018, respectively.