Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Activity for other real estate owned [Roll Forward]
Beginning balance of other real estate owned	$ 30,262	$ 32,785	$ 31,996	$ 35,856
New assets acquired	849	2,722	3,692	4,303
Capitalized costs	0	0	0	0
Fair value adjustments	(670)	(884)	(1,990)	(2,871)
Sale of assets	(775)	(2,575)	(4,032)	(5,240)
Ending balance of other real estate owned	29,666	32,048	29,666	32,048
Carrying cost and fair value adjustments for foreclosed properties	$ 1,100	$ 1,300	$ 3,300	$ 4,100