v3.8.0.1

Counterparty Risk (Narrative) (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2015
Risks and Uncertainties [Abstract] |  |  |  |
Investments held with dealers as collateral | $ 1,160,000 | $ 1,150,000 |  |
Pledged Financial Instruments, Not Separately Reported, Securities For Repurchase Agreements Unsettled | 13,100 | 33,400 |  |
Unencumbered investments held in custody | 79,000 |  |  |
Cash and Cash Equivalents, at Carrying Value | $ 111,423 | $ 123,274 | $ 179,618 | $ 183,909
Concentration risk threshold | 15.00% |  |  |

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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for repurchase agreements which have been sold prior to period end but remain unsettled at the balance sheet date. + References No definition available. + Details
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- Definition Fair value as of the balance sheet date of securities that are free and clear of any encumbrances such as reverse repurchase agreements. + References No definition available. + Details
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- Definition The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for repurchase agreements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729 + Details
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