Fair Value of Assets and Liabilities - Level 3 (Details)	3 Months Ended					6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2023 USD ($) security	Jun. 30, 2022 security
Fair Value of Assets and Liabilities
Beginning balance	$ 1,620,000	$ 1,600,000	$ 1,840,000	$ 1,900,000	$ 2,000,000	$ 0	$ 1,900,000
Transfer of security from Level 2 to Level 3						2,000,000
Unrealized gains (losses) included in other comprehensive income (loss)	$ (40,000)	$ 20,000	$ (240,000)	$ (60,000)	$ (100,000)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Ending balance	$ 1,580,000	$ 1,620,000	$ 1,600,000	$ 1,840,000	$ 1,900,000	$ 2,000,000	$ 1,580,000
Number of investment securities measured at fair value on a recurring basis using significant unobservable inputs | security	1						1	1
Significant unobservable input							The Level 3 valuation is based on the 5/30 swap curve
Significant unobservable input, float	1.00%						1.00%