Other Real Estate Owned and Repossessed Assets - Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income and expenses related to other real estate owned
Net gain (loss) on sale	$ 768	$ 1,320	$ 1,815	$ 2,042
Write-downs	(504)	(63)	(773)	(230)
Net operating expenses	(710)	(260)	(1,218)	(412)
Total	(446)	997	(176)	1,400
Income and expenses related to repossessed assets
Net gain (loss) on sale	(93)	708	(171)	700
Write-downs	0	0	0	0
Net operating expenses	(3)	1	(6)	(3)
Total	$ (96)	$ 709	$ (177)	$ 697