Other Real Estate Owned - Summary of Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Real Estate [Abstract]
Balance at beginning of period	$ 15,334	$ 6,811	$ 16,442	$ 7,403
Transfers from loans	384	274	1,014	1,162
Properties sold	(777)	(702)	(2,209)	(2,930)
(Loss) gain on sale of other real estate owned	51	77	8	948
Transferred to loans	(325)	(36)	(445)	(36)
Write-downs	(28)	(54)	(171)	(177)
Balance at end of period	$ 14,639	$ 6,370	$ 14,639	$ 6,370