Note 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact of ASU 2016-13 (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 198		$ 174
Less allowance for estimated losses on loans/leases	74,786	$ 78,721	81,831	$ 84,376
Commercial Portfolio Segment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	29,056	29,889		35,421
Commercial Real Estate Portfolio Segment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases				42,161
Construction and Land Development [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	14,671	16,972	12,327
Multi-family
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	10,336	9,339	6,278
Direct financing leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	1,465	1,546		1,764
1-4 family real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	4,154	4,541	5,165
Residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases				3,732
Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	815	930	1,045	$ 1,298
C&I - revolving | Commercial Portfolio Segment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	3,619	3,907	3,547
C&I - other | Commercial Portfolio Segment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	25,437	25,982	33,167
C&I - other | Direct financing leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	1,500
CRE - non owner occupied | Commercial Real Estate Portfolio Segment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	7,857	8,549	$ 11,155
Construction Loans [Member] | Construction and Land Development [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Less allowance for estimated losses on loans/leases	$ 14,671	$ 16,972