Other Real Estate Owned and Repossessed Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Changes in other real estate owned
Balance at the beginning of the period	$ 9,716	$ 13,953
Additions due to acquisitions	13,227	440
Other additions	3,945	5,651
Net payments received	(171)	8
Disposals	(6,232)	(8,179)
Write-downs	(376)	(927)
Balance at the end of the period	20,109	10,946
Changes in repossessed assets
Balance at the beginning of the period	219	252
Additions due to acquisitions	313	0
Other additions	2,084	1,761
Net payments received	(764)	(13)
Disposals	(1,231)	(1,739)
Write-downs	0	0
Balance at the end of the period	$ 621	$ 261