Other Real Estate - Changes and Gains (Losses), Net on Other Real Estate (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at beginning of period		$ 34,668	$ 43,228	$ 62,051
Additions	[1]	8,598	12,115	9,235
Disposals		(11,474)	(19,802)	(24,762)
Write-downs		(2,544)	(873)	(3,296)
Balance at end of period		29,248	34,668	43,228
Gain (losses), net on the sale of other real estate included in other real estate expense		$ (291)	$ 700	$ 2,087

[1] 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