Low-Income Housing Tax Credits (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019 USD ($) Fund	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Fund	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) Fund
Low-Income Housing Tax Credits [Abstract]
Number of housing equity funds | Fund		4		4		4
Low-income housing investment		$ 3,000		$ 3,000		$ 3,200
Expected affordable housing tax credits				441
Additional committed capital calls expected		50		50		$ 248
Tax credits and other benefits [Abstract]
Amortization of operating losses		46	$ 80	171	$ 240
Tax benefit of operating losses	[1]	10	16	36	50
Tax credits		106	137	335	384
Total tax benefits		$ 116	$ 153	$ 371	$ 434
Effective income tax rate				21.00%

[1] Computed using a 21% tax rate.