v3.10.0.1

Consolidated Condensed Schedule Of Investments (Investments Sold Short) - USD ($) shares in Thousands, $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investments sold short, at fair value- |  | $ (882,146) |  | $ (642,240) |
Proceeds from investments sold short |  | $ (880,825) |  | $ (640,202) |
TBA - Fixed Rate Agency Securities Sold Short [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (100.88%) | [1],[2],[3] | (74.11%) | [4],[5],[6]
Current Principal/Notional Amount |  | $ (608,800) |  | $ (442,197) |
Investments sold short, at fair value- |  | (618,665) | [1],[3] | (460,189) | [4],[6]
Proceeds from investments sold short |  | (616,872) | [1],[3] | (459,953) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Government National Mortgage Association (30 Year) 3 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (134,610) | [1],[3] | $ (24,410) | [4],[6]
Rate |  | 3.50% | [1],[3] | 3.50% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (135,083) | [1],[3] | $ (25,249) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [1],[3] | $ (92,000) |  |  |
Rate | [1],[3] | 4.00% |  |  |
Investments maturity date | [1],[3] | 2018-08 |  |  |
Investments sold short, at fair value- | [1],[3] | $ (93,642) |  |  |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Government National Mortgage Association (30 Year) 4 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (82,133) | [1],[3] | $ (35,000) | [4],[6]
Rate |  | 4.00% | [1],[3] | 4.00% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-02 | [4],[6]
Investments sold short, at fair value- |  | $ (84,167) | [1],[3] | $ (36,485) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 3.50% [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [1],[3] | $ (63,000) |  |  |
Rate | [1],[3] | 3.50% |  |  |
Investments maturity date | [1],[3] | 2018-08 |  |  |
Investments sold short, at fair value- | [1],[3] | $ (62,626) |  |  |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 5 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (48,930) | [1],[3] | $ (5,680) | [4],[6]
Rate |  | 5.00% | [1],[3] | 5.00% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (51,839) | [1],[3] | $ (6,104) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (42,801) | [1],[3] | $ (12,351) | [4],[6]
Rate |  | 4.50% | [1],[3] | 4.50% | [4],[6]
Investments maturity date |  | 2018-08 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (44,475) | [1],[3] | $ (13,134) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 3 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (38,520) | [1],[3] | $ (43,220) | [4],[6]
Rate |  | 3.50% | [1],[3] | 3.50% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (38,976) | [1],[3] | $ (44,618) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 3 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (25,490) | [1],[3] | $ (21,520) | [4],[6]
Rate |  | 3.00% | [1],[3] | 3.00% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (25,339) | [1],[3] | $ (21,923) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 3 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (20,402) | [1],[3] | $ (69,372) | [4],[6]
Rate |  | 3.50% | [1],[3] | 3.50% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (20,305) | [1],[3] | $ (71,247) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 5 Point 00 Percent 201808 [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [1],[3] | $ (13,970) |  |  |
Rate | [1],[3] | 5.00% |  |  |
Investments maturity date | [1],[3] | 2018-08 |  |  |
Investments sold short, at fair value- | [1],[3] | $ (14,773) |  |  |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 3 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (13,112) | [1],[3] | $ (12,112) | [4],[6]
Rate |  | 3.00% | [1],[3] | 3.00% | [4],[6]
Investments maturity date |  | 2018-08 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (12,687) | [1],[3] | $ (12,113) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (11,110) | [1],[3] | $ (21,710) | [4],[6]
Rate |  | 4.50% | [1],[3] | 4.50% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (11,569) | [1],[3] | $ (23,097) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4.00% [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (9,297) | [1],[3] | $ (27,547) | [4],[6]
Rate |  | 4.00% | [1],[3] | 4.00% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (9,477) | [1],[3] | $ (28,815) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 5 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (6,860) | [1],[3] | $ (6,860) | [4],[6]
Rate |  | 5.50% | [1],[3] | 5.50% | [4],[6]
Investments maturity date |  | 2018-08 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (7,348) | [1],[3] | $ (7,520) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (5,515) | [1],[3] | $ (5,515) | [4],[6]
Rate |  | 3.00% | [1],[3] | 3.00% | [4],[6]
Investments maturity date |  | 2018-08 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (5,332) | [1],[3] | $ (5,517) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Government National Mortgage Association (30 Year) 3 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (1,050) | [1],[3] | $ (1,800) | [4],[6]
Rate |  | 3.00% | [1],[3] | 3.00% | [4],[6]
Investments maturity date |  | 2018-07 | [1],[3] | 2018-01 | [4],[6]
Investments sold short, at fair value- |  | $ (1,027) | [1],[3] | $ (1,813) | [4],[6]
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (15 Year) 3 Point 50 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [4],[6] |  |  | $ (1,100) |
Rate | [4],[6] |  |  | 3.50% |
Investments maturity date | [4],[6] |  |  | 2018-01 |
Investments sold short, at fair value- | [4],[6] |  |  | $ (1,137) |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4 Point 00 Percent 201802 [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [4],[6] |  |  | $ (68,000) |
Rate | [4],[6] |  |  | 4.00% |
Investments maturity date | [4],[6] |  |  | 2018-02 |
Investments sold short, at fair value- | [4],[6] |  |  | $ (71,028) |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4 Point 00 Percent [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [4],[6] |  |  | $ (55,000) |
Rate | [4],[6] |  |  | 4.00% |
Investments maturity date | [4],[6] |  |  | 2018-02 |
Investments sold short, at fair value- | [4],[6] |  |  | $ (57,447) |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4 Point 50 Percent 201802 [Member] | Mortgage-related Residential [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [4],[6] |  |  | $ (31,000) |
Rate | [4],[6] |  |  | 4.50% |
Investments maturity date | [4],[6] |  |  | 2018-02 |
Investments sold short, at fair value- | [4],[6] |  |  | $ (32,942) |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (40.02%) |  | (44.61%) |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (24.94%) |  | (19.27%) |
TBA - Fixed Rate Agency Securities Sold Short [Member] | Government National Mortgage Association [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (35.92%) |  | (10.23%) |
US Government Debt Securities [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (25.96%) | [2],[3] | (8.54%) | [5],[6]
Investments sold short, at fair value- |  | $ (159,220) | [3] | $ (53,021) | [6]
Proceeds from investments sold short |  | (159,005) | [3] | (53,322) | [6]
US Government Debt Securities [Member] | U.S. Treasury Note, 2.75 Percent, Maturity Date 2023 05 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (111,830) |  |  |
Rate | [3] | 2.75% |  |  |
Investments maturity date | [3] | 2023-05 |  |  |
Investments sold short, at fair value- | [3] | $ (111,975) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.63 Percent, Maturity Date 2021 06 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (15,300) |  |  |
Rate | [3] | 2.63% |  |  |
Investments maturity date | [3] | 2021-06 |  |  |
Investments sold short, at fair value- | [3] | $ (15,303) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.88 Percent, Maturity Date 2028 05 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (13,321) |  |  |
Rate | [3] | 2.88% |  |  |
Investments maturity date | [3] | 2028-05 |  |  |
Investments sold short, at fair value- | [3] | $ (13,349) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.88 Percent, Maturity Date 2025 05 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (10,200) |  |  |
Rate | [3] | 2.88% |  |  |
Investments maturity date | [3] | 2025-05 |  |  |
Investments sold short, at fair value- | [3] | $ (10,242) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.75 Percent, Maturity Date 2028 02 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (3,094) |  |  |
Rate | [3] | 2.75% |  |  |
Investments maturity date | [3] | 2028-02 |  |  |
Investments sold short, at fair value- | [3] | $ (3,067) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.75 Percent, Maturity Date 2023 04 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (2,561) |  |  |
Rate | [3] | 2.75% |  |  |
Investments maturity date | [3] | 2023-04 |  |  |
Investments sold short, at fair value- | [3] | $ (2,563) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Bond, 3.00 Percent, Maturity Date 2048 02 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (1,050) |  |  |
Rate | [3] | 3.00% |  |  |
Investments maturity date | [3] | 2048-02 |  |  |
Investments sold short, at fair value- | [3] | $ (1,053) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 1.88 Percent, Maturity Date 2019 12 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (968) |  |  |
Rate | [3] | 1.88% |  |  |
Investments maturity date | [3] | 2019-12 |  |  |
Investments sold short, at fair value- | [3] | $ (960) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.75 Percent, Maturity Date 2025 02 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (448) |  |  |
Rate | [3] | 2.75% |  |  |
Investments maturity date | [3] | 2025-02 |  |  |
Investments sold short, at fair value- | [3] | $ (446) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Bond, 2.75 Percent, Maturity Date 2047 08 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (275) |  |  |
Rate | [3] | 2.75% |  |  |
Investments maturity date | [3] | 2047-08 |  |  |
Investments sold short, at fair value- | [3] | $ (262) |  |  |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.25 Percent, Maturity Date 2027 02 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (30,501) |
Rate | [6] |  |  | 2.25% |
Investments maturity date | [6] |  |  | 2027-02 |
Investments sold short, at fair value- | [6] |  |  | $ (30,108) |
US Government Debt Securities [Member] | US Treasury Note, 1.88 Percent, Maturity Date 2020 12 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (14,000) |
Rate | [6] |  |  | 1.88% |
Investments maturity date | [6] |  |  | 2020-12 |
Investments sold short, at fair value- | [6] |  |  | $ (13,961) |
US Government Debt Securities [Member] | U.S. Treasury Note, 1.75 Percent, Maturity Date 2022 05 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (6,000) |
Rate | [6] |  |  | 1.75% |
Investments maturity date | [6] |  |  | 2022-05 |
Investments sold short, at fair value- | [6] |  |  | $ (5,896) |
US Government Debt Securities [Member] | U.S. Treasury Note, 2.25 Percent, Maturity Date 2027 11 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (2,223) |
Rate | [6] |  |  | 2.25% |
Investments maturity date | [6] |  |  | 2027-11 |
Investments sold short, at fair value- | [6] |  |  | $ (2,192) |
US Government Debt Securities [Member] | US Treasury Note, 2.00 Percent, Maturity Date 2022 11 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (615) |
Rate | [6] |  |  | 2.00% |
Investments maturity date | [6] |  |  | 2022-11 |
Investments sold short, at fair value- | [6] |  |  | $ (610) |
US Government Debt Securities [Member] | U.S. Treasury Bond, 2.25 Percent, Maturity Date 2046 08 [Member] | Government [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (281) |
Rate | [6] |  |  | 2.25% |
Investments maturity date | [6] |  |  | 2046-08 |
Investments sold short, at fair value- | [6] |  |  | $ (254) |
Foreign Government Debt Securities [Member] | Europe [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (3.24%) | [2],[3] | (5.98%) | [5],[6]
Investments sold short, at fair value- |  | $ (19,866) | [3] | $ (37,128) | [6]
Proceeds from investments sold short |  | (19,668) | [3] | (35,149) | [6]
Foreign Government Debt Securities [Member] | Spanish Sovereign Bond, 0.25 Percent [Member] | Government [Member] | Europe [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (16,516) |
Rate | [6] |  |  | 0.25% |
Investments maturity date | [6] |  |  | 2018-04 |
Investments sold short, at fair value- | [6] |  |  | $ (16,556) |
Foreign Government Debt Securities [Member] | European Sovereign Bond [Member] | Government [Member] | Europe [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | (19,370) |  |  |
Investments sold short, at fair value- | [3] | $ (19,866) |  |  |
Foreign Government Debt Securities [Member] | European Sovereign Bond [Member] | Government [Member] | Europe [Member] | Minimum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate | [3] | 0.75% |  |  |
Investments maturity date | [3] | 2019-04 |  |  |
Foreign Government Debt Securities [Member] | European Sovereign Bond [Member] | Government [Member] | Europe [Member] | Maximum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate | [3] | 2.75% |  |  |
Investments maturity date | [3] | 2021-07 |  |  |
Foreign Government Debt Securities [Member] | Spanish Sovereign Bond, 0.75 Percent [Member] | Government [Member] | Europe [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (10,447) |
Rate | [6] |  |  | 0.75% |
Investments maturity date | [6] |  |  | 2021-07 |
Investments sold short, at fair value- | [6] |  |  | $ (10,704) |
Foreign Government Debt Securities [Member] | Spanish Sovereign Bond, 2.75 Percent [Member] | Government [Member] | Europe [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [6] |  |  | $ (9,474) |
Rate | [6] |  |  | 2.75% |
Investments maturity date | [6] |  |  | 2019-04 |
Investments sold short, at fair value- | [6] |  |  | $ (9,868) |
Government debt [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (29.20%) | [2],[3] | (14.52%) | [5],[6]
Investments sold short, at fair value- |  | $ (179,086) | [3] | $ (90,149) | [6]
Proceeds from investments sold short |  | $ (178,673) | [3] | $ (88,471) | [6]
Common Stock Sold Short [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (5.49%) | [2],[3] | (5.91%) | [5],[6]
Investments sold short, at fair value- |  | $ (33,684) | [3] | $ (36,691) | [6]
Proceeds from investments sold short |  | (34,786) | [3] | (36,666) | [6]
Common Stock Sold Short [Member] | Exchange Traded Equity [Member] | Energy [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investments sold short, at fair value- | [6] |  |  | $ (68) |
Investment Sold, Not yet Purchased, Balance, Shares | [6] |  |  | (1) |
Common Stock Sold Short [Member] | Exchange Traded Equity [Member] | Financial [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investments sold short, at fair value- |  | $ (33,684) | [3] | $ (36,623) | [6]
Investment Sold, Not yet Purchased, Balance, Shares |  | (774) | [3] | (671) | [6]
Corporate Debt Sold Short [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (8.27%) | [2],[3] | (8.89%) | [5],[6]
Investments sold short, at fair value- |  | $ (50,711) | [3] | $ (55,211) | [6]
Proceeds from investments sold short |  | (50,494) | [3] | (55,112) | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Basic Materials [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Rate | [3] | 3.45% |  |  |
Investments maturity date | [3] | 2027-06 |  |  |
Investments sold short, at fair value- | [3] | $ (2,551) |  |  |
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Communications [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Investments sold short, at fair value- |  | $ (14,359) | [3] | $ (17,196) | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Communications [Member] | North America [Member] | Minimum [Member] |  |  |  |  |
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Corporate Debt Sold Short [Member] | Various Issuer [Member] | Communications [Member] | North America [Member] | Maximum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate |  | 10.50% | [3] | 10.50% | [6]
Investments maturity date |  | 2025-05 | [3] | 2027-03 | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Consumer [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Investments sold short, at fair value- |  | $ (15,396) | [3] | $ (23,854) | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Consumer [Member] | North America [Member] | Minimum [Member] |  |  |  |  |
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Corporate Debt Sold Short [Member] | Various Issuer [Member] | Consumer [Member] | North America [Member] | Maximum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Corporate Debt Sold Short [Member] | Various Issuer [Member] | Energy [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Investments sold short, at fair value- |  | $ (8,882) | [3] | $ (12,834) | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Energy [Member] | North America [Member] | Minimum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Investments maturity date |  | 2022-04 | [3] | 2022-04 | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Energy [Member] | North America [Member] | Maximum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Corporate Debt Sold Short [Member] | Various Issuer [Member] | Financial [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
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Investments sold short, at fair value- |  | $ (2,381) | [3] | $ (1,019) | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Financial [Member] | North America [Member] | Minimum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate |  | 3.75% | [3] | 5.13% | [6]
Investments maturity date |  | 2024-09 | [3] | 2022-03 | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Financial [Member] | North America [Member] | Maximum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate |  | 5.13% | [3] | 5.25% | [6]
Investments maturity date |  | 2026-03 | [3] | 2024-09 | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Industrial Sector [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (5,955) |  |  |
Investments sold short, at fair value- | [3] | $ (5,908) |  |  |
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Industrial Sector [Member] | North America [Member] | Minimum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate | [3] | 3.55% |  |  |
Investments maturity date | [3] | 2024-10 |  |  |
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Industrial Sector [Member] | North America [Member] | Maximum [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Rate | [3] | 5.90% |  |  |
Investments maturity date | [3] | 2027-02 |  |  |
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Technology Sector [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount |  | $ (255) | [3] | $ (330) | [6]
Rate |  | 4.70% | [3] | 3.63% | [6]
Investments maturity date |  | 2023-04 | [3] | 2021-10 | [6]
Investments sold short, at fair value- |  | $ (230) | [3] | $ (308) | [6]
Corporate Debt Sold Short [Member] | Various Issuer [Member] | Utilities [Member] | North America [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Current Principal/Notional Amount | [3] | $ (940) |  |  |
Rate | [3] | 7.25% |  |  |
Investments maturity date | [3] | 2026-05 |  |  |
Investments sold short, at fair value- | [3] | $ (1,004) |  |  |
Investments Sold Short [Member] |  |  |  |  |
Investments Sold, Not yet Purchased [Line Items] |  |  |  |  |
Investment Sold, Not yet Purchased, Percent of Equity |  | (143.84%) | [2],[3] | (103.43%) | [5],[6]
Investments sold short, at fair value- |  | $ (882,146) | [3] | $ (642,240) | [6]
Proceeds from investments sold short |  | $ (880,825) | [3] | $ (640,202) | [6]
[1] | At June 30, 2018, the Company's short investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 40.02%, 24.94%, and 35.92% of Total Equity, respectively.
[2] | Classification percentages are based on Total Equity.
[3] | See Note 2 and Note 3 in Notes to Consolidated Financial Statements.
[4] | At December 31, 2017, the Company's short investments guaranteed by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, and the Government National Mortgage Association, represented 44.61%, 19.27%, and 10.23% of Total Equity, respectively.
[5] | Classification percentages are based on Total Equity.
[6] | See Note 2 and Note 3 in Notes to Consolidated Financial Statements.

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