Low-Income Housing Tax Credits (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Fund	Dec. 31, 2017 USD ($) Fund
Low-Income Housing Tax Credits [Abstract]
Number of housing equity funds | Fund	4	4
Low-income housing investment	$ 3,200	$ 3,500
Additional committed capital calls expected	248	1,100
Amortization expense	320	340
Tax credits and other tax benefits [Abstract]
Tax credits received	496	412
Tax benefit from losses	67	116
Total tax benefit	$ 563	$ 528