Investment Securities Summary of Gains and Losses from Equity and Debt Securities, and Losses from Other-than-Temporary Impairment (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Gain (Loss) on Securities [Line Items]
Debt securities, Gross Realized Gains	$ 257
Debt securities, Gross Realized Losses	192
Debt securities, Net Gains (Losses)	65
Debt and Equity securities, Gross Realized Gains	257
Debt and Equity securities, Gross Realized Losses	192
Debt and Equity securities, Net Gains (Losses)	$ 65
Gross Realized Gains		$ 19
Gross Realized Losses		0
Net Gains		19
Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Gross Realized Gains		9
Gross Realized Losses		0
Net Gains		9
Debt Securities [Member]
Gain (Loss) on Securities [Line Items]
Gross Realized Gains		10
Gross Realized Losses		0
Net Gains		$ 10

Debt And Equity Securities, Realized Gain

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Debt And Equity Securities, Realized Loss

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No definition available.

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This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

+ References

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This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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Amount of realized gain (loss) on investment in debt and equity securities.

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No definition available.

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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).

+ References

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=82897076&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).

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563

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

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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.

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