Basis of Presentation - Schedule of Impact of Adoption (Details)	Jun. 30, 2023 USD ($) qtr	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Evaluation period | qtr	4
Individually impaired loans evaluation threshold	$ 500,000
Gross loans	935,536,000		$ 958,157,000
Total ACL on loans	6,780,000	$ 6,934,000	8,339,000	$ 8,340,000	$ 8,336,000	$ 8,336,000
ACL on off-balance sheet credit exposures	1,497,000	1,442,000	0
Increase to retained earnings	59,054,000	60,592,000	55,220,000	59,946,000	69,417,000	84,341,000
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to retained earnings	87,136,000	86,060,000	84,669,000	80,617,000	79,259,000	78,350,000
Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			958,157,000
Total ACL on loans			8,339,000
Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			352,433,000
Total ACL on loans	2,336,000	2,214,000	2,417,000	2,239,000	2,224,000	2,068,000
Residential real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			352,433,000
Total ACL on loans			2,417,000
Residential real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			(352,433,000)
Total ACL on loans			(2,417,000)
Residential real estate | Non-revolving residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	363,891,000		335,470,000
Total ACL on loans	2,192,000	2,071,000	2,294,000
Residential real estate | Non-revolving residential real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Residential real estate | Non-revolving residential real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			335,470,000
Total ACL on loans			2,294,000
Residential real estate | Revolving residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	16,835,000		16,963,000
Total ACL on loans	144,000	143,000	123,000
Residential real estate | Revolving residential real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Residential real estate | Revolving residential real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			16,963,000
Total ACL on loans			123,000
Construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			96,620,000
Total ACL on loans	1,674,000	1,861,000	1,032,000	957,000	843,000	837,000
Construction real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			96,620,000
Total ACL on loans			1,032,000
Construction real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			(96,620,000)
Total ACL on loans			(1,032,000)
Construction real estate | Commercial construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	53,884,000		56,501,000
Total ACL on loans	1,525,000	1,713,000	611,000
Construction real estate | Commercial construction real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Construction real estate | Commercial construction real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			56,501,000
Total ACL on loans			611,000
Construction real estate | Residential construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	46,604,000		40,119,000
Total ACL on loans	149,000	148,000	421,000
Construction real estate | Residential construction real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Construction real estate | Residential construction real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			40,119,000
Total ACL on loans			421,000
Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			377,947,000
Total ACL on loans	2,384,000	2,407,000	3,935,000	4,004,000	3,997,000	4,122,000
Commercial Real Estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			377,947,000
Total ACL on loans			3,935,000
Commercial Real Estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			(377,947,000)
Total ACL on loans			(3,935,000)
Commercial Real Estate | Non-residential commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	289,379,000		282,397,000
Total ACL on loans	2,152,000	2,186,000	2,931,000
Commercial Real Estate | Non-residential commercial real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Commercial Real Estate | Non-residential commercial real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			282,397,000
Total ACL on loans			2,931,000
Commercial Real Estate | Multi-family residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	99,014,000		95,550,000
Total ACL on loans	232,000	221,000	1,004,000
Commercial Real Estate | Multi-family residential real estate | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Commercial Real Estate | Multi-family residential real estate | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			95,550,000
Total ACL on loans			1,004,000
Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Individually impaired loans evaluation threshold	500,000
Gross loans	41,252,000		40,973,000
Total ACL on loans	354,000	368,000	301,000	318,000	289,000	275,000
Commercial | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			40,973,000
Total ACL on loans			301,000
Commercial | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	2,572,000		2,204,000
Total ACL on loans	5,000	5,000	10,000	10,000	10,000	11,000
Consumer | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			2,204,000
Total ACL on loans			10,000
Consumer | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Municipal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans	22,105,000		87,980,000
Total ACL on loans	27,000	79,000	95,000	27,000	88,000	86,000
Municipal | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			87,980,000
Total ACL on loans			95,000
Municipal | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			0
Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans	$ 0		549,000	$ 785,000	$ 885,000	$ 937,000
Unallocated | Pre-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			549,000
Unallocated | Reclassification to CECL Portfolio Segmentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			0
Post-CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			958,157,000
Total ACL on loans			6,844,000
ACL on off-balance sheet credit exposures			1,458,000
Post-CECL Adoption | Residential real estate | Non-revolving residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			335,470,000
Total ACL on loans			2,024,000
Post-CECL Adoption | Residential real estate | Revolving residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			16,963,000
Total ACL on loans			148,000
Post-CECL Adoption | Construction real estate | Commercial construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			56,501,000
Total ACL on loans			1,593,000
Post-CECL Adoption | Construction real estate | Residential construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			40,119,000
Total ACL on loans			131,000
Post-CECL Adoption | Commercial Real Estate | Non-residential commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			282,397,000
Total ACL on loans			2,174,000
Post-CECL Adoption | Commercial Real Estate | Multi-family residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			95,550,000
Total ACL on loans			224,000
Post-CECL Adoption | Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			40,973,000
Total ACL on loans			492,000
Post-CECL Adoption | Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			2,204,000
Total ACL on loans			5,000
Post-CECL Adoption | Municipal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			87,980,000
Total ACL on loans			53,000
Post-CECL Adoption | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			0
Impact of CECL Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(1,495,000)
ACL on off-balance sheet credit exposures		$ 0	1,458,000
Increase to retained earnings			37,000
Impact of CECL Adoption | Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to retained earnings			37,000
Impact of CECL Adoption | Residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			(245,000)
Impact of CECL Adoption | Residential real estate | Non-revolving residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(270,000)
Impact of CECL Adoption | Residential real estate | Revolving residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			25,000
Impact of CECL Adoption | Construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			692,000
Impact of CECL Adoption | Construction real estate | Commercial construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			982,000
Impact of CECL Adoption | Construction real estate | Residential construction real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(290,000)
Impact of CECL Adoption | Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			(1,537,000)
Impact of CECL Adoption | Commercial Real Estate | Non-residential commercial real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(757,000)
Impact of CECL Adoption | Commercial Real Estate | Multi-family residential real estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(780,000)
Impact of CECL Adoption | Commercial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			191,000
Impact of CECL Adoption | Consumer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(5,000)
Impact of CECL Adoption | Municipal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross loans			0
Total ACL on loans			(42,000)
Impact of CECL Adoption | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total ACL on loans			$ (549,000)