Other Real Estate and Covered Other Real Estate - Changes and Losses, Net On Covered Other Real Estate (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Covered Other Real Estate Roll Forward
Covered other real estate, beginning of period	$ 1,651	$ 6,060
Transfers from covered loans	302	0
FASB ASC 310-30 adjustment for the residual recorded investment	0	(903)
Net transfers from covered loans	302	(903)
Disposals	(1,457)	(221)
Write-downs	0	(142)
Covered other real estate, end of period	496	4,794
Gain (loss), net on the sale of covered other real estate included in ORE/Foreclosure expense	$ 56	$ (53)