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Note 11 - Debt (Details Textual) - USD ($)
$ in Thousands
24 Months Ended
Feb. 10, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available, Percentage of Total Assets   45.00%    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged   $ 1,070,000    
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available   686,200    
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds   681,900    
Financing Receivable, before Allowance for Credit Loss   2,433,015 $ 2,218,852 $ 1,754,175
Short-Term Debt   93,746 186,528  
Fixed to Floating Rate Subordinated Note Due2031 [Member]        
Debt Instrument, Face Amount $ 50,000      
Debt Instrument, Interest Rate, Stated Percentage 3.75%      
Debt, Offering Price, Percentage 100.00%      
Proceeds from Debt, Net of Issuance Costs $ 49,300      
Fixed to Floating Rate Subordinated Note Due2031 [Member] | Secured Overnight Financing Rate (SOFR) [Member]        
Debt Instrument, Basis Spread on Variable Rate 3.37%      
Federal Reserve Bank [Member]        
Line of Credit Facility, Maximum Borrowing Capacity   351,600 205,800  
Short-Term Debt   0 0  
Federal Reserve Bank, Bank Term Funding Program [Member]        
Line of Credit Facility, Current Borrowing Capacity   90,500    
Long-Term Line of Credit   89,900    
Other Financial Institutions [Member]        
Short-Term Debt   0    
Line of Credit Facility, Remaining Borrowing Capacity   101,000    
Asset Pledged as Collateral [Member] | Federal Reserve Bank, Bank Term Funding Program [Member]        
Marketable Securities   77,000    
Asset Pledged as Collateral [Member] | Consumer Loan [Member]        
Financing Receivable, before Allowance for Credit Loss   $ 631,100 $ 579,800