Other Real Estate Owned and Repossessed Assets - Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income and expenses related to other real estate owned
Net gain (loss) on sale	$ 1,047	$ 722
Write-downs	(269)	(167)
Net operating expenses	(508)	(153)
Total	270	402
Income and expenses related to repossessed assets
Net gain (loss) on sale	(78)	(8)
Write-downs	0	0
Net operating expenses	(3)	(5)
Total	$ (81)	$ (13)