Other Real Estate - Changes and Gains, Net on Other Real Estate (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	[1]
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at beginning of period	$ 62,051	$ 78,828
Additions	1,766	3,608
Disposals	(6,385)	(8,994)
Write-downs	(1,464)	(1,140)
Balance at end of period	55,968	72,302
Gain, net on the sale of other real estate included in other real estate expense	$ 470	$ 1,868

[1] The changes and gains, net on other real estate for the three months ended March 31, 2016 include covered other real estate.