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Investments - Offsetting of Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Asset derivatives: |  |
Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets | $ 8,753 | $ 2,647
Free-standing derivatives |  |
Asset derivatives: |  |
Gross Amounts | 8,753 | 2,647
Gross Amounts Offset in the Consolidated Balance Sheets | 0 | 0
Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets | 8,753 | 2,647
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments | 0 | 0
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received | 8,663 | 1,868
Net Amount | $ 90 | $ 779

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