Other Real Estate - Changes and Gains (Losses), Net on Other Real Estate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reconciliation Of Carrying Amount Of Real Estate Investments Roll Forward
Balance at beginning of period			$ 34,668	$ 43,228
Additions			2,101	7,084
Disposals			(3,859)	(9,680)
Write-downs			(1,667)	(965)
Balance at end of period	$ 31,243	$ 39,667	31,243	39,667
Gains (losses), net on the sale of other real estate included in other real estate expense	$ 123	$ 588	$ 246	$ 1,002