Borrowings - Borrowed Funds (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Borrowed funds	$ 786,715	$ 446,283
Federal Home Loan Bank of Pittsburgh
Debt Instrument [Line Items]
Borrowed funds	580,247	438,051
Total term notes payable to the FHLB \| Federal Home Loan Bank of Pittsburgh
Debt Instrument [Line Items]
Borrowed funds, long-term	$ 55,247	$ 105,482
Average rate (as a percent)	3.92%	4.09%
Total term notes payable to the FHLB \| Federal Home Loan Bank of Pittsburgh
Debt Instrument [Line Items]
Borrowed funds, short-term	$ 525,000	$ 332,569
Average rate (as a percent)	4.18%	3.99%
Revolving line of credit, FHLB of Pittsburgh \| Federal Home Loan Bank of Pittsburgh \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowed funds, short-term	$ 206,400	$ 0
Average rate (as a percent)	4.20%	0.00%
Collateralized borrowings, due within one year
Debt Instrument [Line Items]
Borrowed funds, short-term	$ 68	$ 8,232
Average rate (as a percent)	2.85%	1.55%

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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