Held-to-Maturity Securities (Net Premuims) (Details) - Collateralized Mortgage Backed Securities [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held To Maturity Securities, Premiums	$ 54,391	$ 60,519
Held-to-maturity Securities, Discounts	(27,190)	(31,474)
Held-to-maturity Securities, Premiums (Discounts), Net	$ 27,201	$ 29,045

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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