XML 55 R44.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Financial Derivatives Narrative (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative [Line Items] |  |
U.S. Treasury securities sold short, at fair value | $ 26,367 | $ 81,289
US Treasury Securities [Member] |  |
Derivative [Line Items] |  |
U.S. Treasury securities sold short, at fair value | 26,367 | 81,289
Investment Sold, Not yet Purchased, Balance, Principal Amount | $ 26,800 | $ 82,500

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of obligations arising from US treasury and other US government and agency debt obligations sold short. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35711043&loc=d3e42429-110968 + Details
Name: | us-gaap_FinancialInstrumentsSoldNotYetPurchasedUSGovernmentAndAgencyObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition For investments which are quantified by principal amount, the principle balance held at close of period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-12A.Column B) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611177-123010 + Details
Name: | us-gaap_InvestmentSoldNotYetPurchasedBalancePrincipalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |