Other Real Estate Owned and Repossessed Assets - Rollforward Tables (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Changes in other real estate owned
Balance at the beginning of the period	$ 16,812	$ 9,716
Other additions	3,776	2,155
Net payments received	(202)	(85)
Disposals	(5,976)	(3,230)
Write-downs	(773)	(230)
Balance at the end of the period	13,637	8,326
Changes in repossessed assets
Balance at the beginning of the period	375	219
Other additions	2,556	1,215
Net payments received	0	(764)
Disposals	(1,986)	(556)
Write-downs	0	0
Balance at the end of the period	$ 945	$ 114