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Note 4 - Loans - Loan Held for Investment by Loan Portfolio Segments, Internal Risk Ratings and Vintage Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loans originated in current year	$ 2,545,564	$ 3,724,618
Loans originated year prior	3,349,730	3,581,730
Loans originated three years prior	3,168,851	3,052,314
Loans originated four years prior	2,593,759	1,588,314
Loans originated five years prior	1,364,973	1,686,965
Total, Loans Amortized Cost Basis by Origination Year Prior	4,069,831	3,571,544
Total, Revolving Loans	2,248,231	2,306,710
Total, Revolving Converted to Term Loans	24,475	25,225
Total loans	19,365,414	19,537,420
Loans originated in current year, write offs	188	0
Loans originated year prior, write offs	1,586	992
Loans originated three years prior, write offs	3,166	1,520
Loans originated four years prior, write offs	9,009	384
Loans originated five years prior, write offs	553	4,641
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	4,237	14,429
Total, Revolving Loans Write Offs	12,733	1,520
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	31,472	23,486
Total loans	19,365,414	19,537,420
Commercial Portfolio Segment [Member]
Loans originated in current year	402,743	387,945
Loans originated year prior	259,797	329,467
Loans originated three years prior	216,034	345,104
Loans originated four years prior	211,728	122,567
Loans originated five years prior	58,833	76,044
Total, Loans Amortized Cost Basis by Origination Year Prior	102,119	141,937
Total, Revolving Loans	1,835,445	1,890,712
Total, Revolving Converted to Term Loans	8,026	8,424
Total loans	3,094,725	3,302,200
Loans originated in current year, write offs	188	0
Loans originated year prior, write offs	1,586	977
Loans originated three years prior, write offs	3,151	1,312
Loans originated four years prior, write offs	8,950	384
Loans originated five years prior, write offs	257	3,672
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	64	6,044
Total, Revolving Loans Write Offs	12,730	1,520
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	26,926	13,909
Total loans	3,094,725	3,302,200
Commercial Portfolio Segment [Member] | Pass [Member]
Loans originated in current year	400,836	381,705
Loans originated year prior	237,303	323,939
Loans originated three years prior	203,190	326,650
Loans originated four years prior	201,837	96,725
Loans originated five years prior	27,359	75,281
Total, Loans Amortized Cost Basis by Origination Year Prior	90,724	136,162
Total, Revolving Loans	1,675,260	1,775,162
Total, Revolving Converted to Term Loans	7,804	8,308
Total loans	2,844,313	3,123,932
Total loans	2,844,313	3,123,932
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans originated in current year	0	4,488
Loans originated year prior	17,424	4,875
Loans originated three years prior	740	8,559
Loans originated four years prior	0	23,380
Loans originated five years prior	9,117	0
Total, Loans Amortized Cost Basis by Origination Year Prior	5,139	0
Total, Revolving Loans	92,632	75,419
Total, Revolving Converted to Term Loans	0	0
Total loans	125,052	116,721
Total loans	125,052	116,721
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans originated in current year	50	1,752
Loans originated year prior	5,070	653
Loans originated three years prior	12,104	9,895
Loans originated four years prior	6,773	2,462
Loans originated five years prior	22,357	763
Total, Loans Amortized Cost Basis by Origination Year Prior	6,256	5,775
Total, Revolving Loans	67,553	40,131
Total, Revolving Converted to Term Loans	222	116
Total loans	120,385	61,547
Total loans	120,385	61,547
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans originated in current year	1,857	0
Loans originated year prior	0	0
Loans originated three years prior	0	0
Loans originated four years prior	3,118	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	4,975	0
Total loans	4,975	0
Real Estate Construction Portfolio Segment [Member]
Loans originated in current year	22,562	31,461
Loans originated year prior	60,065	131,984
Loans originated three years prior	126,200	165,684
Loans originated four years prior	93,115	44,850
Loans originated five years prior	16,858	21,034
Total, Loans Amortized Cost Basis by Origination Year Prior	0	26,129
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	318,800	421,142
Loans originated in current year, write offs	0	0
Loans originated year prior, write offs	0	0
Loans originated three years prior, write offs	0	0
Loans originated four years prior, write offs	0	0
Loans originated five years prior, write offs	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	0	4,221
Total, Revolving Loans Write Offs	0	0
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	0	4,221
Total loans	318,800	421,142
Real Estate Construction Portfolio Segment [Member] | Pass [Member]
Loans originated in current year	22,562	29,550
Loans originated year prior	55,835	131,984
Loans originated three years prior	126,200	153,977
Loans originated four years prior	57,546	19,461
Loans originated five years prior	3,021	13,298
Total, Loans Amortized Cost Basis by Origination Year Prior	0	3,131
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	265,164	351,401
Total loans	265,164	351,401
Real Estate Construction Portfolio Segment [Member] | Special Mention [Member]
Loans originated in current year	0	1,911
Loans originated year prior	0	0
Loans originated three years prior	0	11,707
Loans originated four years prior	35,569	25,389
Loans originated five years prior	13,837	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	22,998
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	49,406	62,005
Total loans	49,406	62,005
Real Estate Construction Portfolio Segment [Member] | Substandard [Member]
Loans originated in current year	0	0
Loans originated year prior	4,230	0
Loans originated three years prior	0	0
Loans originated four years prior	0	0
Loans originated five years prior	0	7,736
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	4,230	7,736
Total loans	4,230	7,736
Commercial Real Estate Portfolio Segment [Member]
Loans originated in current year	1,472,030	2,159,093
Loans originated year prior	2,006,936	1,990,019
Loans originated three years prior	1,807,297	1,635,585
Loans originated four years prior	1,502,515	893,972
Loans originated five years prior	832,435	1,047,548
Total, Loans Amortized Cost Basis by Origination Year Prior	2,206,768	1,809,430
Total, Revolving Loans	198,485	185,985
Total, Revolving Converted to Term Loans	0	0
Total loans	10,026,466	9,721,632
Loans originated in current year, write offs	0	0
Loans originated year prior, write offs	0	0
Loans originated three years prior, write offs	0	208
Loans originated four years prior, write offs	0	0
Loans originated five years prior, write offs	296	969
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	4,173	4,164
Total, Revolving Loans Write Offs	0	0
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	4,469	5,341
Total loans	10,026,466	9,721,632
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans originated in current year	1,463,225	2,121,489
Loans originated year prior	1,987,280	1,959,239
Loans originated three years prior	1,724,563	1,585,010
Loans originated four years prior	1,428,124	887,508
Loans originated five years prior	800,645	1,019,952
Total, Loans Amortized Cost Basis by Origination Year Prior	2,108,143	1,726,015
Total, Revolving Loans	180,394	184,601
Total, Revolving Converted to Term Loans	0	0
Total loans	9,692,374	9,483,814
Total loans	9,692,374	9,483,814
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans originated in current year	8,805	37,604
Loans originated year prior	8,292	18,910
Loans originated three years prior	28,465	38,405
Loans originated four years prior	16,462	3,499
Loans originated five years prior	24,844	10,303
Total, Loans Amortized Cost Basis by Origination Year Prior	19,888	17,210
Total, Revolving Loans	9,939	1,384
Total, Revolving Converted to Term Loans	0	0
Total loans	116,695	127,315
Total loans	116,695	127,315
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans originated in current year	0	0
Loans originated year prior	11,364	11,870
Loans originated three years prior	54,269	12,170
Loans originated four years prior	57,929	2,965
Loans originated five years prior	6,946	17,293
Total, Loans Amortized Cost Basis by Origination Year Prior	78,737	66,205
Total, Revolving Loans	8,152	0
Total, Revolving Converted to Term Loans	0	0
Total loans	217,397	110,503
Total loans	217,397	110,503
Residential Portfolio Segment [Member]
Loans originated in current year	642,965	1,141,005
Loans originated year prior	1,022,932	1,129,178
Loans originated three years prior	1,019,204	905,938
Loans originated four years prior	786,401	526,925
Loans originated five years prior	456,847	542,339
Total, Loans Amortized Cost Basis by Origination Year Prior	1,760,944	1,594,048
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	5,689,293	5,839,433
Loans originated in current year, write offs	0	0
Loans originated year prior, write offs	0	0
Loans originated three years prior, write offs	0	0
Loans originated four years prior, write offs	59	0
Loans originated five years prior, write offs	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	0	0
Total, Revolving Loans Write Offs	0	0
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	59	0
Total loans	5,689,293	5,839,433
Residential Portfolio Segment [Member] | Pass [Member]
Loans originated in current year	642,568	1,140,998
Loans originated year prior	1,020,419	1,128,526
Loans originated three years prior	1,014,842	902,613
Loans originated four years prior	781,218	524,315
Loans originated five years prior	452,623	541,005
Total, Loans Amortized Cost Basis by Origination Year Prior	1,745,923	1,583,118
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	5,657,593	5,820,575
Total loans	5,657,593	5,820,575
Residential Portfolio Segment [Member] | Special Mention [Member]
Loans originated in current year	0	0
Loans originated year prior	0	0
Loans originated three years prior	0	0
Loans originated four years prior	0	33
Loans originated five years prior	33	0
Total, Loans Amortized Cost Basis by Origination Year Prior	1,585	1,619
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	1,618	1,652
Total loans	1,618	1,652
Residential Portfolio Segment [Member] | Substandard [Member]
Loans originated in current year	397	7
Loans originated year prior	2,513	652
Loans originated three years prior	4,362	3,325
Loans originated four years prior	5,183	2,577
Loans originated five years prior	4,191	1,334
Total, Loans Amortized Cost Basis by Origination Year Prior	13,436	9,311
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	30,082	17,206
Total loans	30,082	17,206
Equity Lines Portfolio Segment [Member]
Loans originated in current year	0	0
Loans originated year prior	0	101
Loans originated three years prior	72	0
Loans originated four years prior	0	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	214,301	230,013
Total, Revolving Converted to Term Loans	16,449	16,801
Total loans	230,822	246,915
Loans originated in current year, write offs	0	0
Loans originated year prior, write offs	0	0
Loans originated three years prior, write offs	0	0
Loans originated four years prior, write offs	0	0
Loans originated five years prior, write offs	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	0	0
Total, Revolving Loans Write Offs	3	0
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	3	0
Total loans	230,822	246,915
Equity Lines Portfolio Segment [Member] | Pass [Member]
Loans originated in current year	0	0
Loans originated year prior	0	98
Loans originated three years prior	72	0
Loans originated four years prior	0	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	211,374	227,502
Total, Revolving Converted to Term Loans	16,277	16,628
Total loans	227,723	244,228
Total loans	227,723	244,228
Equity Lines Portfolio Segment [Member] | Special Mention [Member]
Loans originated in current year	0	0
Loans originated year prior	0	3
Loans originated three years prior	0	0
Loans originated four years prior	0	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	11	0
Total loans	11	3
Total loans	11	3
Equity Lines Portfolio Segment [Member] | Substandard [Member]
Loans originated in current year	0	0
Loans originated year prior	0	0
Loans originated three years prior	0	0
Loans originated four years prior	0	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	2,927	2,511
Total, Revolving Converted to Term Loans	161	173
Total loans	3,088	2,684
Total loans	3,088	2,684
Installment and Other Loans [Member ]
Loans originated in current year	5,264	5,114
Loans originated year prior	0	981
Loans originated three years prior	44	3
Loans originated four years prior	0	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	5,308	6,098
Loans originated in current year, write offs	0	0
Loans originated year prior, write offs	0	15
Loans originated three years prior, write offs	15	0
Loans originated four years prior, write offs	0	0
Loans originated five years prior, write offs	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs	0	0
Total, Revolving Loans Write Offs	0	0
Total, Revolving Converted to Term Loans, Write Offs	0	0
YTD gross write-offs	15	15
Total loans	5,308	6,098
Installment and Other Loans [Member ] | Pass [Member]
Loans originated in current year	5,264	5,114
Loans originated year prior	0	981
Loans originated three years prior	44	3
Loans originated four years prior	0	0
Loans originated five years prior	0	0
Total, Loans Amortized Cost Basis by Origination Year Prior	0	0
Total, Revolving Loans	0	0
Total, Revolving Converted to Term Loans	0	0
Total loans	5,308	6,098
Total loans	$ 5,308	$ 6,098

X

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

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- Definition

Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn.

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