Securities (Securities With Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Less than Twelve Months, Fair Value	$ 4,893	$ 6,947
Less than Twelve Months, Unrealized Loss	82	51
Twelve Months or More, Fair Value	5,911	4,470
Twelve Months or More, Unrealized Loss	89	31
Total, Fair Value	10,804	11,417
Total, Unrealized Loss	171	82
U.S. Treasury [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than Twelve Months, Fair Value	4,893	6,947
Less than Twelve Months, Unrealized Loss	82	51
Twelve Months or More, Fair Value	5,911	4,470
Twelve Months or More, Unrealized Loss	89	31
Total, Fair Value	10,804	11,417
Total, Unrealized Loss	$ 171	$ 82