Credit Quality Indicators for RRE and Consumer Loans (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Residential Real Estate
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	$ 30,716
Term loans originated in 2019	268,951
Term loans originated in 2018	186,895
Term loans originated in 2017	126,134
Term loans originated in 2016	83,637
Term loans originated in 2015 and prior	258,882
Revolving loans	2,615
Loans receivable	957,830
Residential Real Estate | Performing
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	30,716
Term loans originated in 2019	266,516
Term loans originated in 2018	183,955
Term loans originated in 2017	125,673
Term loans originated in 2016	82,608
Term loans originated in 2015 and prior	252,149
Revolving loans	2,615
Loans receivable	944,232
Residential Real Estate | 30-89 Days Past Due
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	2,250
Term loans originated in 2018	2,521
Term loans originated in 2017	461
Term loans originated in 2016	244
Term loans originated in 2015 and prior	2,988
Revolving loans	0
Loans receivable	8,464
Residential Real Estate | Non-Accrual and 90 Days or More Past Due
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	185
Term loans originated in 2018	419
Term loans originated in 2017	0
Term loans originated in 2016	785
Term loans originated in 2015 and prior	3,745
Revolving loans	0
Loans receivable	5,134
Home Equity
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	2,140
Term loans originated in 2018	2,643
Term loans originated in 2017	2,706
Term loans originated in 2016	1,747
Term loans originated in 2015 and prior	21,116
Revolving loans	622,590
Loans receivable	652,942
Home Equity | Performing
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	2,102
Term loans originated in 2018	2,643
Term loans originated in 2017	2,706
Term loans originated in 2016	1,747
Term loans originated in 2015 and prior	19,696
Revolving loans	615,220
Loans receivable	644,114
Home Equity | 30-89 Days Past Due
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	38
Term loans originated in 2018	0
Term loans originated in 2017	0
Term loans originated in 2016	0
Term loans originated in 2015 and prior	696
Revolving loans	4,951
Loans receivable	5,685
Home Equity | Non-Accrual and 90 Days or More Past Due
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	0
Term loans originated in 2018	0
Term loans originated in 2017	0
Term loans originated in 2016	0
Term loans originated in 2015 and prior	724
Revolving loans	2,419
Loans receivable	3,143
Other Consumer
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	33,081
Term loans originated in 2019	106,151
Term loans originated in 2018	69,022
Term loans originated in 2017	30,799
Term loans originated in 2016	16,696
Term loans originated in 2015 and prior	30,219
Revolving loans	23,285
Loans receivable	309,253
Other Consumer | Performing
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	33,077
Term loans originated in 2019	105,790
Term loans originated in 2018	68,594
Term loans originated in 2017	30,261
Term loans originated in 2016	16,217
Term loans originated in 2015 and prior	28,412
Revolving loans	23,223
Loans receivable	305,574
Other Consumer | 30-89 Days Past Due
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	4
Term loans originated in 2019	317
Term loans originated in 2018	350
Term loans originated in 2017	472
Term loans originated in 2016	231
Term loans originated in 2015 and prior	1,452
Revolving loans	55
Loans receivable	2,881
Other Consumer | Non-Accrual and 90 Days or More Past Due
Credit Quality Indicators By Origination
Term loans originated in 2020 (year-to-date)	0
Term loans originated in 2019	44
Term loans originated in 2018	78
Term loans originated in 2017	66
Term loans originated in 2016	248
Term loans originated in 2015 and prior	355
Revolving loans	7
Loans receivable	$ 798