Investment Securities At Fair Value (Gross Realized Gains and Losses on Available-for-Sale Securities) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Gross realized gains on sales	$ 9	$ 2	$ 47	$ 2
Gross realized losses on sales	(3)	(7)	(5)	(15)
Net gains (losses) recognized on debt securities available for sale	6	(5)	42	(13)
Gross realized losses on other-than-temporary impairments	$ (2)	$ (225)	$ (5)	$ (811)

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), excluding other-than-temporary impairment (OTTI).

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Other-than-temporary Impairment Loss, Debt and Equity Securities, Available-for-sale

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