Other Real Estate Owned ("OREO") (Foreclosed Real Estate Roll Forward) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Other Real Estate Owned ("OREO") [Abstract]
Balance at beginning of year	$ 8,111	$ 9,341	$ 9,341
Additions of underlying property	3,215	101	307
Disposals of underlying property	(316)		(1,005)
Valuation allowance	(61)	(90)	(532)
Balance at end of period	$ 10,949	$ 9,352	$ 8,111