Loans - Summary of activity in allowance for loan losses by class (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allowance for loan losses:
Beginning balance	$ 8,878	$ 6,049	$ 6,989	$ 5,629
Provision (credit) for loan losses	1,900	400	3,800	825
Recoveries	0	0	0	0
Loans charged-off	(102)	(16)	(113)	(21)
Total ending allowance balance	10,676	6,433	10,676	6,433
Real Estate \| 1 - 4 Family Residential
Allowance for loan losses:
Beginning balance	497	380	344	407
Provision (credit) for loan losses	242	(8)	395	(35)
Recoveries	0	0	0	0
Loans charged-off	0	0	0	0
Total ending allowance balance	739	372	739	372
Real Estate \| Multifamily
Allowance for loan losses:
Beginning balance	1,441	949	1,048	952
Provision (credit) for loan losses	685	(29)	1,078	(32)
Recoveries	0	0	0	0
Loans charged-off	0	0	0	0
Total ending allowance balance	2,126	920	2,126	920
Real Estate \| Commercial Real Estate
Allowance for loan losses:
Beginning balance	817	408	560	357
Provision (credit) for loan losses	165	(2)	422	49
Recoveries	0	0	0	0
Loans charged-off	0	0	0	0
Total ending allowance balance	982	406	982	406
Real Estate \| Construction
Allowance for loan losses:
Beginning balance		159	161	149
Provision (credit) for loan losses		2	(161)	12
Recoveries	0	0	0	0
Loans charged-off	0	0	0	0
Total ending allowance balance	0	161	0	161
Commercial
Allowance for loan losses:
Beginning balance	5,086	3,486	4,048	3,110
Provision (credit) for loan losses	(270)	371	768	752
Recoveries	0	0	0	0
Loans charged-off	0	(14)	0	(19)
Total ending allowance balance	4,816	3,843	4,816	3,843
Consumer
Allowance for loan losses:
Beginning balance	1,037	667	828	654
Provision (credit) for loan losses	1,078	66	1,298	79
Recoveries	0	0	0	0
Loans charged-off	(102)	(2)	(113)	(2)
Total ending allowance balance	$ 2,013	$ 731	$ 2,013	$ 731

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount, after recoveries, of loans and leases that have been written-off.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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Amount of expense related to estimated loss from loan and lease transactions.

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