Summary of Significant Accounting Policies - Employee Benefit Plans and Operating Segments (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Aug. 31, 2020 USD ($)
Employee Benefit Plans
Age	21 years
Minimum service term	3 months
Vesting period	3 years
Employer contribution under 401(k) plan	$ 1,400	$ 1,100
Employer contribution under ESOP	1,100	1,200
Employer contributions	663	550
Stock compensation related expense	437
One-time contribution under ESOP	$ 0	$ 600
Shares purchased under ESOP | shares	45,606	161,576
Shares purchased under ESOP | shares		133,280
Shares released under ESOP | shares	26,656
Unallocated shares | shares	106,624
Shares purchased for ESOP average purchase price | $ / shares	$ 24.30	$ 15.06
Shares held by ESOP | shares	269,904
Employee Stock Ownership Plan ESOP Value Shares Purchase Authorized Amount		$ 2,000	$ 2,000
Operating Segments
Number of Operating Segments | segment	3