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Debt - Schedule of Subordinated Debentures (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Interest rate	0.26161%
NYM Preferred Trust I
Debt Instrument [Line Items]
Principal value of trust preferred securities	$ 25,000	$ 25,000
NYM Preferred Trust I | CME Term, SOFR
Debt Instrument [Line Items]
Interest rate	0.26161%	0.26161%
NYM Preferred Trust I | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate	3.75%	3.75%
NYM Preferred Trust II
Debt Instrument [Line Items]
Principal value of trust preferred securities	$ 20,000	$ 20,000
NYM Preferred Trust II | CME Term, SOFR
Debt Instrument [Line Items]
Interest rate	0.26161%	0.26161%
NYM Preferred Trust II | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate	3.95%	3.95%

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