Securities (Schedule of Unrealized Loss on Investments, HTM) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 77,879	$ 36,337
Less than 12 months, unrealized loss	1,452	346
More than 12 months, fair value	7,143	17,423
More than 12 months, unrealized loss	263	595
Total, fair value	85,022	53,760
Total, unrealized loss	1,715	941
Asset-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	77,879	36,337
Less than 12 months, unrealized loss	1,452	346
More than 12 months, fair value	6,340	16,430
More than 12 months, unrealized loss	182	495
Total, fair value	84,219	52,767
Total, unrealized loss	1,634	841
Asset-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
More than 12 months, fair value	803	993
More than 12 months, unrealized loss	81	100
Total, fair value	803	993
Total, unrealized loss	$ 81	$ 100