Other Real Estate Owned and Repossessed Assets - Rollforward Tables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Changes in other real estate owned
Balance at the beginning of the period	$ 16,812	$ 9,716
Other additions	3,119	938
Net payments received	(39)	(185)
Disposals	(3,728)	(1,371)
Write-downs	(269)	(167)
Balance at the end of the period	15,895	8,931
Changes in repossessed assets
Balance at the beginning of the period	375	219
Other additions	1,162	729
Net payments received	0	(11)
Disposals	(1,037)	(620)
Write-downs	0	0
Balance at the end of the period	$ 500	$ 317