Note 4 - Loans Leases Receivable - Aging of the Loan Lease Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans and leases	$ 4,680,132	$ 4,243,791
Loans and leases as a percentage of total loan/lease portfolio	100.00%	100.00%
C&I - revolving
Loans and leases	$ 248,483
C&I - other
Loans and leases	4,640
Current
Loan	$ 4,666,986	$ 4,225,516
Current as a percentage of total loan/lease portfolio	99.72%	99.57%
Current | C&I - revolving
Loan	$ 248,483
Financing Receivables, 30 to 59 Days Past Due [Member]
Loan	$ 2,202	$ 3,591
Past due as a percentage of total loan/lease portfolio	0.05%	0.08%
Financing Receivables, 60 to 89 Days Past Due [Member]
Loan	$ 8,184	$ 741
Past due as a percentage of total loan/lease portfolio	0.17%	0.02%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loan		$ 3
Accruing Past Due 90 Days or More	$ 1
Accruing past due 90 days or more as a percentage of total loan/lease portfolio	0.00%	0.00%
Past Due
Nonaccrual Loans/Leases	$ 2,759	$ 13,940
Nonaccrual Loans/Leases as a percentage of total loan/lease portfolio	0.06%	0.33%
Commercial Portfolio Segment [Member]
Loans and leases	$ 1,595,085	$ 1,726,723
Commercial Portfolio Segment [Member] | C&I - revolving
Loans and leases	248,483	1,726,723
Commercial Portfolio Segment [Member] | C&I - other
Loans and leases	1,346,602
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans and leases	918,571	541,455
Commercial Portfolio Segment [Member] | Current
Loan		1,720,058
Commercial Portfolio Segment [Member] | Current | C&I - other
Loan	1,337,034
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Loan		1,535
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | C&I - other
Loan	859
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Loan		323
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | C&I - other
Loan	7,308
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | C&I - other
Accruing Past Due 90 Days or More	1
Commercial Portfolio Segment [Member] | Past Due
Nonaccrual Loans/Leases		4,807
Commercial Portfolio Segment [Member] | Past Due | C&I - other
Nonaccrual Loans/Leases	1,400
Commercial Real Estate Portfolio Segment [Member]
Loans and leases		2,107,629
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Loans and leases	421,701	496,471
Commercial Real Estate Portfolio Segment [Member] | CRE - non owner occupied
Loans and leases	646,500
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans and leases		541,455
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		1,069,703
Commercial Real Estate Portfolio Segment [Member] | Current | Owner Occupied Commercial Real Estate Loans [Member]
Loan	421,701	496,459
Commercial Real Estate Portfolio Segment [Member] | Current | CRE - non owner occupied
Loan	646,500
Commercial Real Estate Portfolio Segment [Member] | Current | Construction Loans [Member]
Loan		541,455
Commercial Real Estate Portfolio Segment [Member] | Current | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loan		1,062,215
Commercial Real Estate Portfolio Segment [Member] | Past Due | Owner Occupied Commercial Real Estate Loans [Member]
Nonaccrual Loans/Leases		12
Commercial Real Estate Portfolio Segment [Member] | Past Due | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Nonaccrual Loans/Leases		7,488
Construction and Land Development [Member] | Construction Loans [Member]
Loans and leases	918,571
Construction and Land Development [Member] | Current | Construction Loans [Member]
Loan	918,498
Construction and Land Development [Member] | Past Due | Construction Loans [Member]
Nonaccrual Loans/Leases	73
Multi-family
Loans and leases	600,412
Multi-family | Current
Loan	600,412
Direct financing leases
Loans and leases	45,191	66,016
Direct financing leases | Current
Loan	44,174	64,918
Direct financing leases | Financing Receivables, 30 to 59 Days Past Due [Member]
Loan	10	501
Direct financing leases | Financing Receivables, 60 to 89 Days Past Due [Member]
Loan	160	191
Direct financing leases | Past Due
Nonaccrual Loans/Leases	847	406
1-4 family real estate
Loans and leases	377,361
1-4 family real estate | Current
Loan	374,912
1-4 family real estate | Financing Receivables, 30 to 59 Days Past Due [Member]
Loan	1,325
1-4 family real estate | Financing Receivables, 60 to 89 Days Past Due [Member]
Loan	716
1-4 family real estate | Past Due
Nonaccrual Loans/Leases	408
Residential real estate
Loans and leases		252,121
Residential real estate | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Loans and leases		1,069,703
Residential real estate | Current
Loan		249,364
Residential real estate | Financing Receivables, 30 to 59 Days Past Due [Member]
Loan		1,512
Residential real estate | Financing Receivables, 60 to 89 Days Past Due [Member]
Loan		223
Residential real estate | Past Due
Nonaccrual Loans/Leases		1,022
Consumer
Loans and leases	75,311	91,302
Consumer | Current
Loan	75,272	91,047
Consumer | Financing Receivables, 30 to 59 Days Past Due [Member]
Loan	8	43
Consumer | Financing Receivables, 60 to 89 Days Past Due [Member]
Loan		4
Consumer | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loan		3
Consumer | Past Due
Nonaccrual Loans/Leases	$ 31	205
Installment and other consumer loans
Loans and leases		$ 91,302