Other Real Estate and Repossessed Assets Acquired in Settlement of Loans - Valuation Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of activity in valuation allowance for other real estate owned in settlement of loans
Balance, beginning of period	$ 2,956	$ 3,022	$ 3,002	$ 3,221
Provision for other real estate owned	31	0	49	26
Charge-offs	0	(20)	(64)	(245)
Balance, end of period	$ 2,987	$ 3,002	$ 2,987	$ 3,002