v3.26.3
Borrowings - Narrative (Details)
9 Months Ended
Sep. 15, 2026
Sep. 09, 2020
USD ($)
Sep. 30, 2026
USD ($)
business_trust
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]          
Total loans receivable, net     $ 13,243,670,000   $ 12,857,104,000
Number of statutory business trusts owned | business_trust     7    
Trust Preferred Investments          
Debt Instrument [Line Items]          
Interest paid, net     $ 6,000,000 $ 6,000,000  
Maximum period for which interest payment on the subordinated debentures can be deferred (in years)     5 years    
Interest deferral     $ 0    
Collateralized borrowings, due within one year          
Debt Instrument [Line Items]          
Borrowed funds, short-term     68,000   8,232,000
Cash and securities collateral     280,000    
Subordinated debt          
Debt Instrument [Line Items]          
Debt issued   $ 125,000,000      
Stated rate (as a percent)   4.00%      
Interest rate   3.89%      
Redemption price, percentage 100.00%        
Interest paid, net     6,000,000 $ 4,000,000  
Federal Home Loan Bank of Pittsburgh | Total term notes payable to the FHLB          
Debt Instrument [Line Items]          
Borrowed funds, long-term     55,247,000   105,482,000
Federal Home Loan Bank of Pittsburgh | Revolving line of credit, FHLB of Pittsburgh | Revolving Credit Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity     250,000,000    
Borrowed funds, short-term     206,400,000   0
Federal Home Loan Bank of Pittsburgh | Total term notes payable to the FHLB          
Debt Instrument [Line Items]          
Borrowed funds, short-term     525,000,000   $ 332,569,000
Federal Home Loan Bank of Pittsburgh | Residential First Mortgage and Other Loans          
Debt Instrument [Line Items]          
Total loans receivable, net     $ 6,600,000,000