Other Real Estate - Changes and Gains, Net on Other Real Estate (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	[1]
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at beginning of period		$ 62,051	$ 78,828
Additions	[2]	7,481	22,028
Disposals		(18,583)	(32,173)
Write-downs		(2,593)	(3,690)
Balance at end of period		48,356	64,993
Gain, net on the sale of other real estate included in other real estate expense		$ 1,722	$ 6,152

[1] The changes and gains, net on other real estate for the nine months ended September 30, 2016 include covered other real estate.

[2] Includes $475 thousand of other real estate acquired in the Reliance merger on April 7, 2017.