Note 14 - Disclosure of Financial Instruments Not Reported at Fair Value - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Cash and cash equivalents		$ 253,066	$ 265,959
Accrued interest receivable		26,439	26,830
Non-interest bearing		1,508,203	1,548,624
Time deposits	[1]	1,176,422	983,277
Accrued interest payable		2,036	2,094
Reported Value Measurement [Member]
Cash and cash equivalents		253,066	265,959
HTM debt securities		374,912	439,837
Federal Home Loan Bank stock		29,419	16,236
Loans, net		6,192,790	5,691,664
Accrued interest receivable		26,439	26,830
Non-interest bearing		1,508,203	1,548,624
Transaction deposits		4,041,448	4,138,847
Time deposits		1,176,422	983,277
Securities sold under agreement to repurchase		149,852	152,991
Federal funds purchased		6,442	12,852
Subordinated debentures		26,806	26,740
FHLB advances		325,000	200,000
Accrued interest payable		2,036	2,094
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents		253,066	265,959
HTM debt securities		352,430	408,519
Federal Home Loan Bank stock		29,419	16,236
Loans, net		5,962,345	5,520,059
Accrued interest receivable		26,439	26,830
Non-interest bearing		1,508,203	1,548,624
Transaction deposits		4,041,448	4,138,847
Time deposits		1,174,740	976,841
Securities sold under agreement to repurchase		149,852	152,991
Federal funds purchased		6,442	12,852
Subordinated debentures		26,290	26,746
FHLB advances		319,230	200,047
Accrued interest payable		2,036	2,094
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents		253,066	265,959
HTM debt securities		152,153	198,327
Federal Home Loan Bank stock		0	0
Loans, net		0	0
Accrued interest receivable		26,439	26,830
Non-interest bearing		1,508,203	1,548,624
Transaction deposits		0	0
Time deposits		0	0
Securities sold under agreement to repurchase		0	0
Federal funds purchased		0	0
Subordinated debentures		0	0
FHLB advances		0	0
Accrued interest payable		2,036	2,094
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents		0	0
HTM debt securities		200,277	210,192
Federal Home Loan Bank stock		29,419	16,236
Loans, net		0	0
Accrued interest receivable		0	0
Non-interest bearing		0	0
Transaction deposits		4,041,448	4,138,847
Time deposits		1,174,740	976,841
Securities sold under agreement to repurchase		149,852	152,991
Federal funds purchased		6,442	12,852
Subordinated debentures		26,290	26,746
FHLB advances		319,230	200,047
Accrued interest payable		0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents		0	0
HTM debt securities		0	0
Federal Home Loan Bank stock		0	0
Loans, net		5,962,345	5,520,059
Accrued interest receivable		0	0
Non-interest bearing		0	0
Transaction deposits		0	0
Time deposits		0	0
Securities sold under agreement to repurchase		0	0
Federal funds purchased		0	0
Subordinated debentures		0	0
FHLB advances		0	0
Accrued interest payable		$ 0	$ 0

[1] Includes $203 thousand and $597 thousand in brokered deposits as of September 30, 2024 and December 31, 2023, respectively.