Investment Securities (Details) $ in Thousands	Sep. 30, 2025 USD ($) Security		Dec. 31, 2024 USD ($)		Dec. 31, 2023 USD ($)
Investment Securities [Abstract]
Allowance for credit losses	$ 450		$ 450		$ 450
Number of investment available-for-sale securities held (in Security) | Security	320
Less than 12 months, number of positions (in Security) | Security	24
12 months or more, number of positions (in Security) | Security	109
Investment securities holdings	$ 0
Maximum threshold shareholders equity percentage to an issuer	10.00%
Carrying amount of securities	$ 1,604,339		1,233,407
Mortgage-backed Securities [Member]
Investment Securities [Abstract]
Allowance for credit losses	0	[1]	0	[1]	0
Municipal Securities [Member]
Investment Securities [Abstract]
Allowance for credit losses	450		450		$ 450
Past due principal or interest payments of securities	0
Public Deposits, Federal Home Loan Bank ("FHLB") Borrowings, and Other Government Agency Deposits [Member] | Asset Pledged as Collateral [Member]
Investment Securities [Abstract]
Carrying amount of securities	$ 688,400		$ 712,500

[1] All mortgage-backed securities and collateralized mortgage obligations were issued by an agency or government sponsored entity of the U.S. Government.