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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					$ 44,267	$ 44,267
Balance at beginning of period		$ 46,685	$ 46,178	$ 46,032
Loans charged off [Abstract]
Total loan charge offs		91	30	139	77
Recoveries of loans previously charged off [Abstract]
Total recoveries		320	137	421	242
Net loans (recoveries) charged off		(229)	(107)	(282)	(165)
(Credit) provision for credit losses		0	(1,000)	600	(1,500)
Balance at end of period		46,914	45,285	46,914	45,285	46,032
Benefit for credit losses		(500)	(491)	(200)	(691)
Credit losses on unfunded commitments		500	509	800	809
New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	51	30	68	77
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	320	137	396	242
Florida [Member]
Loans charged off [Abstract]
Total loan charge offs		40	0	71	0
Recoveries of loans previously charged off [Abstract]
Total recoveries		0	0	25	0
Commercial [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					3,135	3,135
Balance at beginning of period		2,708	2,177	2,596
Loans charged off [Abstract]
Total loan charge offs		0	4	0	40
Recoveries of loans previously charged off [Abstract]
Total recoveries		129	4	129	4
Net loans (recoveries) charged off		(129)	0	(129)	36
(Credit) provision for credit losses		(227)	97	(115)	161
Balance at end of period		2,610	2,274	2,610	2,274	2,596
Commercial [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	0	4	0	40
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	129	4	129	4
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	0	0
Real Estate Mortgage - 1 to 4 Family [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					40,689	40,689
Balance at beginning of period		43,766	43,931	43,271
Loans charged off [Abstract]
Total loan charge offs		22	12	22	12
Recoveries of loans previously charged off [Abstract]
Total recoveries		183	131	261	228
Net loans (recoveries) charged off		(161)	(119)	(239)	(216)
(Credit) provision for credit losses		140	(1,170)	557	(1,742)
Balance at end of period		44,067	42,880	44,067	42,880	43,271
Real Estate Mortgage - 1 to 4 Family [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	22	12	22	12
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	183	131	236	228
Real Estate Mortgage - 1 to 4 Family [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	25	0
Installment [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					443	443
Balance at beginning of period		211	70	165
Loans charged off [Abstract]
Total loan charge offs		69	14	117	25	88
Recoveries of loans previously charged off [Abstract]
Total recoveries		8	2	31	10
Net loans (recoveries) charged off		61	12	86	15
(Credit) provision for credit losses		87	73	158	81
Balance at end of period		237	131	237	131	165
Installment [Member] | New York and Other States [Member]
Loans charged off [Abstract]
Total loan charge offs	[1]	29	14	46	25
Recoveries of loans previously charged off [Abstract]
Total recoveries	[1]	8	2	31	10
Installment [Member] | Florida [Member]
Loans charged off [Abstract]
Total loan charge offs		40	0	71	0
Recoveries of loans previously charged off [Abstract]
Total recoveries		$ 0	$ 0	$ 0	0
ASU 2016-13 [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					46,620	46,620
ASU 2016-13 [Member] | Commercial [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					2,149	2,149
ASU 2016-13 [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					44,406	44,406
ASU 2016-13 [Member] | Installment [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					65	65
ASU 2016-13 [Member] | Impact of Adoption [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					2,353	2,353
ASU 2016-13 [Member] | Impact of Adoption [Member] | Commercial [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					(986)	(986)
ASU 2016-13 [Member] | Impact of Adoption [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					3,717	3,717
ASU 2016-13 [Member] | Impact of Adoption [Member] | Installment [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period					$ (378)	$ (378)

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