Other Real Estate - Changes and Gains (Losses), Net on Other Real Estate (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at beginning of period			$ 34,668	$ 43,228
Additions			5,684	10,368
Disposals			(6,574)	(15,264)
Write-downs			(1,804)	(1,857)
Balance at end of period	$ 31,974	$ 36,475	31,974	36,475
Gains (losses), net on the sale of other real estate included in other real estate expense	$ (122)	$ 224	$ 124	$ 1,226