Low-Income Housing Tax Credits (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2020 USD ($) Fund	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Fund	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Fund
Low-Income Housing Tax Credits [Abstract]
Number of housing equity funds | Fund		4		4		4
Low-income housing investment		$ 2,800		$ 2,800		$ 3,000
Expected affordable housing tax credits						413
Additional committed capital calls expected		18		18		$ 50
Tax credits and other benefits [Abstract]
Amortization of operating losses		45	$ 46	136	$ 171
Tax benefit of operating losses	[1]	10	10	29	36
Tax credits		105	106	314	335
Total tax benefits		$ 115	$ 116	$ 343	$ 371
Effective income tax rate				21.00%

[1] Computed using a 21% tax rate.