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Debt - Preferred Securities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
CME Term, SOFR
Debt Instrument [Line Items]
Interest rate	0.26161%	0.26161%
NYM Preferred Trust I
Debt Instrument [Line Items]
Principal value of trust preferred securities	$ 25,000	$ 25,000	$ 25,000
NYM Preferred Trust I | CME Term, SOFR
Debt Instrument [Line Items]
Interest rate		0.26161%
NYM Preferred Trust I | SOFR
Debt Instrument [Line Items]
Interest rate		3.75%
NYM Preferred Trust I | LIBOR
Debt Instrument [Line Items]
Interest rate			3.75%
NYM Preferred Trust II
Debt Instrument [Line Items]
Principal value of trust preferred securities	$ 20,000	$ 20,000	$ 20,000
NYM Preferred Trust II | CME Term, SOFR
Debt Instrument [Line Items]
Interest rate		0.26161%
NYM Preferred Trust II | SOFR
Debt Instrument [Line Items]
Interest rate		3.95%
NYM Preferred Trust II | LIBOR
Debt Instrument [Line Items]
Interest rate			3.95%

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