Other Real Estate Owned - Changes in Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in other real estate owned
Balance at the beginning of the year	$ 0	$ 754	$ 2,019
Additions	434	32	1,431
Additions from acquisitions	1,796	0	0
Proceeds from dispositions	(198)	(930)	(2,486)
Gain on sale, net	0	144	173
Valuation adjustment	(49)	0	(383)
Balance at the end of the year	$ 1,983	$ 0	$ 754