v3.26.1
Borrowings - Capital Debt Securities (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Junior subordinated debentures $ 130,223 $ 130,093
Trust Preferred Investments    
Debt Instrument [Line Items]    
Capital debt securities 128,875  
Junior subordinated debentures $ 130,223 130,093
Trust Preferred Investments | Northwest Bancorp Capital Trust III    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 1.38%  
Capital debt securities $ 50,000  
Junior subordinated debentures $ 51,547 51,547
Trust Preferred Investments | Northwest Bancorp Statutory Trust IV    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 1.38%  
Capital debt securities $ 50,000  
Junior subordinated debentures $ 51,547 51,547
Trust Preferred Investments | LNB Trust II    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 1.48%  
Capital debt securities $ 7,875  
Junior subordinated debentures $ 8,119 8,119
Trust Preferred Investments | Union National Capital Trust I    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 2.85%  
Capital debt securities $ 8,000  
Junior subordinated debentures $ 8,061 8,049
Trust Preferred Investments | Union National Capital Trust II    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 2.00%  
Capital debt securities $ 3,000  
Junior subordinated debentures $ 2,864 2,850
Trust Preferred Investments | MFBC Statutory Trust I    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 1.70%  
Capital debt securities $ 5,000  
Junior subordinated debentures $ 4,047 3,995
Trust Preferred Investments | Universal Preferred Trust    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 1.69%  
Capital debt securities $ 5,000  
Junior subordinated debentures $ 4,038 $ 3,986