v3.26.3
FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Schedule of Book Value and Estimated Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financial assets:    
Investment securities available-for-sale $ 3,691,117 $ 3,542,246
Stock in FHLB of Pittsburgh 10,488 10,194
Accrued interest receivable 81,171 80,285
Financial liabilities:    
Deposits 18,384,086 17,642,488
Accrued interest payable 20,216 19,646
Other liabilities 203,224 125,861
Level 1    
Financial liabilities:    
Other liabilities 0 0
Level 1 | Book Value    
Financial assets:    
Cash, cash equivalents, and restricted cash 1,930,257 1,699,154
Level 1 | Fair Value    
Financial assets:    
Cash, cash equivalents, and restricted cash 1,930,257 1,699,154
Level 2    
Financial liabilities:    
Other liabilities 201,537 120,432
Level 2 | Book Value    
Financial assets:    
Investment securities available-for-sale 3,691,117 3,542,246
Investment securities held-to-maturity, net 925,722 968,331
Loans, held for sale 21,386 61,573
Stock in FHLB of Pittsburgh 10,488 10,194
Accrued interest receivable 81,171 80,285
Financial liabilities:    
Deposits 18,384,086 17,642,488
Borrowed funds 304,369 302,682
Accrued interest payable 20,216 19,646
Level 2 | Fair Value    
Financial assets:    
Investment securities available-for-sale 3,691,117 3,542,246
Investment securities held-to-maturity, net 770,479 879,066
Loans, held for sale 21,386 61,573
Stock in FHLB of Pittsburgh 10,488 10,194
Accrued interest receivable 81,171 80,285
Financial liabilities:    
Deposits 18,366,376 17,631,304
Borrowed funds 277,333 288,470
Accrued interest payable 20,216 19,646
Level 3    
Financial assets:    
Other investments 6,077 11,090
Other assets 7 80
Financial liabilities:    
Other liabilities 1,687 5,429
Level 3 | Book Value    
Financial assets:    
Other investments 8,595 13,441
Loans and leases, net 13,457,002 13,082,027
Financial liabilities:    
Standby letters of credit 1,003 766
Level 3 | Fair Value    
Financial assets:    
Other investments 8,595 13,441
Loans and leases, net 13,433,401 13,171,197
Financial liabilities:    
Standby letters of credit 1,003 766
Levels 2, 3 | Book Value    
Financial assets:    
Other assets 203,877 145,505
Financial liabilities:    
Other liabilities 203,224 125,861
Levels 2, 3 | Fair Value    
Financial assets:    
Other assets 203,877 145,505
Financial liabilities:    
Other liabilities $ 203,224 $ 125,861