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Income Taxes Income Taxes (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Unrecognized Tax Benefits | $ 0 | $ 0 |  |
Cumulative effect of adoption of ASU 2018-02 |  |  |  | $ 0
Retained Earnings [Member] |  |  |  |
Cumulative effect of adoption of ASU 2018-02 |  |  |  | $ 1,344
Effect of ASU Adoption [Member] | Retained Earnings [Member] |  |  |  |
Cumulative effect of adoption of ASU 2018-02 |  |  | $ 1,300 |

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- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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