Accumulated Other Comprehensive Loss (Schedule of accumulated other comprehensive income (loss)) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Unrealized Gains and Losses on Available-for-Sale Securities, Beginning balance	$ (41)	$ (262)	$ (183)	$ (165)
Unrealized Gains and Losses on Available-for-Sale Securities, Other comprehensive (loss) income	21	(20)	163	(117)
Unrealized Gains and Losses on Available-for-Sale Securities, Ending balance	(20)	(282)	(20)	(282)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance	(41)	(262)	(183)	(165)
Other comprehensive (loss) income	21	(20)	163	(117)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance	$ (20)	$ (282)	$ (20)	$ (282)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580

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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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- Definition

Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities and unrealized holding gain (loss) related to transfers of securities into the available-for-sale classification and out of the held-to-maturity classification.

+ References

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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