Derivatives - Narrative (Details)	1 Months Ended	6 Months Ended	12 Months Ended
	Jul. 31, 2017 USD ($) derivative	Jun. 30, 2021 USD ($) derivative	Dec. 31, 2018 USD ($)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Notional amount	$ 100,000,000
Net liability position		$ 0		$ 0
Cash collateral pledged on derivatives		$ 66,557,000		57,985,000
Minimum
Derivative [Line Items]
Period to lock interest rate on mortgage loan commitments		45 days
Maximum
Derivative [Line Items]
Period to lock interest rate on mortgage loan commitments		90 days
Subordinated debt
Derivative [Line Items]
Number of derivative instruments | derivative		2
Borrowings		$ 30,930,000
Interest rate swaps
Derivative [Line Items]
Number of derivative instruments | derivative	3
Interest rate swaps | Subordinated debt
Derivative [Line Items]
Notional amount		30,000,000
Fair value of contract of net liability balances of interest rate swaps		$ 1,391,000		$ 1,909,000
Interest rate swaps three years
Derivative [Line Items]
Notional amount	$ 30,000,000
Derivative notional amount maturity period	3 years
Interest rate swaps four years
Derivative [Line Items]
Notional amount	$ 35,000,000
Derivative notional amount maturity period	4 years
Interest rate swaps five years
Derivative [Line Items]
Notional amount	$ 35,000,000
Derivative notional amount maturity period	5 years
Gain on canceled derivatives			$ 1,564,000
London Interbank Offered Rate (LIBOR) | Interest rate swaps | Subordinated debt
Derivative [Line Items]
Derivative variable interest rate		2.08%