Loans - Narrative (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) contract	Mar. 31, 2018 USD ($) contract	Dec. 31, 2018 USD ($)
Receivables [Abstract]
Number of loans under trouble debt restructuring | contract	2	0
Value of loans under trouble debt restructuring	$ 2,000,000	$ 0
Troubled debt restructuring outstanding amount	14,900,000		$ 13,300,000
Average impaired loans	36,300,000	31,100,000
Interest income recorded on impaired loans	400,000	400,000
Interest income related to impaired loans with impairment measured on present value of expected future cash flows	$ 35,000	$ 88,000