Borrowings - Schedule of Borrowed Funds FHLBNY and Correspondent Bank Advances Maturity and Call Date (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Line Of Credit Facility [Line Items]
2021	$ 3,000	$ 3,000
2022	77,880	77,880
2023	28,375	28,375
Total	109,255	117,255
2021	3,000	3,000
2022	77,880	77,880
2023	28,375	28,375
Total	$ 109,255	$ 117,255
2021	1.84%	1.84%
2022	1.73%	1.73%
2023	2.82%	2.82%
Total	2.02%	1.90%
Correspondent Bank
Line Of Credit Facility [Line Items]
Overnight line of credit advance		$ 8,000
Overnight line of credit advance		$ 8,000
Overnight line of credit advance		0.34%