Loan Portfolio and Allowance for Credit Losses, Allowance for Credit Losses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period		$ 50,606	$ 49,220	$ 50,248	$ 48,578	$ 48,578
Loans charged off [Abstract]
Total loan charge offs		133	34	259	195
Recoveries of loans previously charged off [Abstract]
Total recoveries		142	86	526	289
Net loans (recoveries) charged off		(9)	(52)	(267)	(94)
(Credit) Provision for credit losses		650	500	750	1,100
Balance at end of period		51,265	49,772	51,265	49,772	50,248
Provision (benefit) for credit losses		650	500	950	1,100
Credit losses on unfunded commitments		0	0	200	0
New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	39	10	150	171
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	142	86	211	289
Florida [Member]
Loans charged off [Abstract]
Total loan charge offs		94	24	109	24
Recoveries of loans previously charged off [Abstract]
Total recoveries		0	0	315	0
Commercial [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period		3,023	2,742	3,420	2,735	2,735
Loans charged off [Abstract]
Total loan charge offs		0	0	4	0
Recoveries of loans previously charged off [Abstract]
Total recoveries		0	0	322	0
Net loans (recoveries) charged off		0	0	(318)	0
(Credit) Provision for credit losses		111	687	(604)	694
Balance at end of period		3,134	3,429	3,134	3,429	3,420
Commercial [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	0	0	4	0
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	0	0	7	0
Commercial [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs		0	0	0	0
Recoveries of loans previously charged off [Abstract]
Total recoveries		0	0	315	0
Real Estate Mortgage - 1 to 4 Family [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period		47,307	46,295	46,636	45,625	45,625
Loans charged off [Abstract]
Total loan charge offs		17	17	99	134
Recoveries of loans previously charged off [Abstract]
Total recoveries		138	74	179	269
Net loans (recoveries) charged off		(121)	(57)	(80)	(135)
(Credit) Provision for credit losses		449	592	1,161	369
Balance at end of period		47,877	46,129	47,877	46,129	46,636
Real Estate Mortgage - 1 to 4 Family [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	17	0	99	117
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	138	74	179	269
Real Estate Mortgage - 1 to 4 Family [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs		0	17	0	17
Recoveries of loans previously charged off [Abstract]
Total recoveries		0	0	0	0
Installment [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period		276	183	192	218	218
Loans charged off [Abstract]
Total loan charge offs		116	17	156	61	170
Recoveries of loans previously charged off [Abstract]
Total recoveries		4	12	25	20
Net loans (recoveries) charged off		112	5	131	41
(Credit) Provision for credit losses		90	36	193	37
Balance at end of period		254	214	254	214	$ 192
Installment [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	22	10	47	54
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	4	12	25	20
Installment [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs		94	7	109	7
Recoveries of loans previously charged off [Abstract]
Total recoveries		$ 0	$ 0	$ 0	$ 0

[1] Includes New York, New Jersey, Vermont and Massachusetts.