Mortgage Servicing Rights (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Mortgage servicing rights [Roll Forward]
Mortgage servicing rights at beginning of the period	$ 282,000	$ 109,000
Additions	4,931,000	175,000
Amortization	(226,000)	(29,000)
Sales	0	0
Mortgage servicing rights at end of the period	4,987,000	255,000
Valuation allowance at end of period	(21,000)	(80,000)
Mortgage servicing rights at end of the period, net	4,966,000	175,000
Fair value of mortgage servicing rights	6.4	186,000
Estimated future servicing rights amortization expense by period [Abstract]
2020	559,000
2021	979,000
2022	775,000
2023	699,000
2024	593,000
Thereafter	1,361,000
Total	4,966,000
MSR Sales [Abstract]
Loans originated for sale	1,800,000,000
Sales of loans held for sale	1,730,000,000
Generated mortgage banking income	94,200,000
Loans sold on a servicing retained basis	706,500,000		$ 64,900,000
Sold mortgage servicing rights	$ 0	$ 0