Benefit Plans - ESOP (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
ESOP, requisite service period	1 year		1 year
ESOP, requisite service period (per year)	1000 hours		1000 hours
ESOP, shares purchased to partially fulfill annual discretionary allocation	40,000		32,000
ESOP, cash contribution	$ 0	$ 0	$ 0
ESOP, vesting percentage	100.00%
ESOP, vesting period	6 years
ESOP expense	$ 577,000		$ 602,000
ESOP, number of allocated shares acquired with employer loan		40,000		40,000
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
ESOP participation age limit	21 years		21 years