Investment Securities Narrative (Details)	1 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) security state	Dec. 31, 2019 USD ($) security state	Dec. 31, 2018 USD ($) security	Dec. 31, 2017 USD ($)	Sep. 30, 2014 USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of securities temporarily impaired (security) | security	86	86	511
Number of securities temporarily impaired for 12 months or more (security) | security	28	28	232
Period of temporary impairment		12 months	12 months
Amortized cost of securities transferred	$ 24,900,000	$ 24,900,000			$ 89,780,000
Fair value of securities transferred					89,757,000
Net unrealized gains (losses) on securities transferred	1,600,000	1,600,000			$ (15,000)
Proceeds from sales of securities available for sale	4,300,000	8,339,000	$ 459,000	$ 15,587,000
Gain on sale of securities	209,000	224,000
Net unrealized loss on securities transferred from available for sale to held to maturity	$ 182,000	$ 182,000	197,000
Number of states | state	6	6
Federal Home Loan Bank Stock	$ 7,945,000	$ 7,945,000	10,549,000
Impairment losses	0	0
Other equity securities
Debt Securities, Available-for-sale [Line Items]
Securities pledged as collateral	$ 214,173,000	$ 214,173,000	$ 222,829,000