Securities (Schedule of Unrealized Loss on Investments, HTM) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 38,105	$ 36,607
Less than 12 months, unrealized loss	1,087	254
More than 12 months, fair value	42,598	45,718
More than 12 months, unrealized loss	1,936	1,182
Total, fair value	80,703	82,325
Total, unrealized loss	3,023	1,436
Asset-backed Securities, Issued by US Government Sponsored Enterprises and U.S. Agencies [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	33,218	36,607
Less than 12 months, unrealized loss	961	254
More than 12 months, fair value	42,074	45,119
More than 12 months, unrealized loss	1,891	1,130
Total, fair value	75,292	81,726
Total, unrealized loss	2,852	1,384
Asset-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
More than 12 months, fair value	524	599
More than 12 months, unrealized loss	45	52
Total, fair value	524	599
Total, unrealized loss	45	$ 52
US Government Agencies Callable Agency Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	4,887
Less than 12 months, unrealized loss	126
Total, fair value	4,887
Total, unrealized loss	$ 126