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Fair Values (Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Financial assets: |  |
Loans receivable and other lending investments, net | $ 1,300,655 | $ 1,450,439
Financial liabilities: |  |
Debt obligations, net | 3,476,400 | 3,389,908
Fair Value |  |
Financial assets: |  |
Loans receivable and other lending investments, net | 1,300,000 | 1,500,000
Financial liabilities: |  |
Debt obligations, net | $ 3,700,000 | $ 3,600,000

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