Other Real Estate - Changes and Gains (Losses), Net on Other Real Estate (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	[1]
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at beginning of period		$ 43,228	$ 62,051	[1]	$ 78,828
Additions	[2]	12,115	9,235		24,525
Disposals		(19,802)	(24,762)		(36,801)
Write-downs		(873)	(3,296)		(4,501)
Balance at end of period		34,668	43,228		62,051
Gain (losses), net on the sale of other real estate included in other real estate expense		$ 700	$ 2,087		$ 7,031

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

[2] For the year ended December 31, 2017, additions to other real estate included $475 thousand of other real estate acquired in the Reliance merger on April 7, 2017