Consolidated Condensed Schedule Of Investments (Investments Sold Short) - USD ($) shares in Thousands, $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2015		Dec. 31, 2014
Investments Sold, Not yet Purchased [Line Items]
Investments sold short, at fair value-		$ (1,183,384)		$ (1,291,370)
Proceeds from investments sold short		$ (1,185,455)		$ (1,290,091)
TBA - Fixed Rate Agency Securities Sold Short [Member]
Investments Sold, Not yet Purchased [Line Items]
Investment Sold, Not yet Purchased, Percent of Equity		(144.13%)	[1],[2],[3]	(153.39%)	[4],[5],[6],[7]
Current Principal/Notional Amount		$ (1,063,670)		$ (1,135,218)
Investments sold short, at fair value-		(1,119,975)	[1],[3]	(1,209,539)	[4],[6],[7]
Proceeds from investments sold short		$ (1,120,845)	[1],[3]	$ (1,205,876)	[4],[6],[7]
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		(114.63%)		(121.95%)
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		(28.88%)		(31.44%)
Government debt sold short [Member]
Investments Sold, Not yet Purchased [Line Items]
Investment Sold, Not yet Purchased, Percent of Equity		(8.16%)	[2],[3]	(7.02%)	[5],[6],[7]
Investments sold short, at fair value-		$ (63,409)	[3]	$ (55,315)	[6],[7]
Proceeds from investments sold short		$ (64,610)	[3]	$ (56,610)	[6],[7]
Common Stock Sold Short [Member]
Investments Sold, Not yet Purchased [Line Items]
Investment Sold, Not yet Purchased, Percent of Equity	[5],[6],[7]			(3.36%)
Investments sold short, at fair value-	[6],[7]			$ (26,516)
Proceeds from investments sold short	[6],[7]			$ (27,605)
Securities Sold Short - Securities Sold, Not Yet Purchased [Member]
Investments Sold, Not yet Purchased [Line Items]
Investment Sold, Not yet Purchased, Percent of Equity		(152.29%)	[2],[3]	(163.77%)	[5],[6],[7]
Investments sold short, at fair value-		$ (1,183,384)	[3]	$ (1,291,370)	[6],[7]
Proceeds from investments sold short		$ (1,185,455)	[3]	$ (1,290,091)	[6],[7]
North America [Member] | Government debt sold short [Member]
Investments Sold, Not yet Purchased [Line Items]
Investment Sold, Not yet Purchased, Percent of Equity		(4.94%)	[2],[3]	(3.14%)	[5],[6],[7]
Investments sold short, at fair value-		$ (38,396)	[3]	$ (24,709)	[6],[7]
Proceeds from investments sold short		$ (38,531)	[3]	$ (24,602)	[6],[7]
Europe [Member] | Government debt sold short [Member]
Investments Sold, Not yet Purchased [Line Items]
Investment Sold, Not yet Purchased, Percent of Equity		(3.22%)	[2],[3]	(3.88%)	[5],[6],[7]
Investments sold short, at fair value-		$ (25,013)	[3]	$ (30,606)	[6],[7]
Proceeds from investments sold short		(26,079)	[3]	(32,008)	[6],[7]
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 3.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (207,792)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (214,050)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 year) 3.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (113,130)
Description	[1],[3]	Federal National Mortgage Association (15 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (119,335)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 4.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (91,138)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	4.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (96,517)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 4.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (84,060)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	4.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (90,857)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 4.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (72,197)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	4.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (76,314)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 4.00% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (68,000)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	4.00%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (71,865)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 year) 3.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (64,900)
Description	[1],[3]	Federal National Mortgage Association (15 year)
Rate	[1],[3]	3.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (67,232)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 4.00% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (49,000)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	4.00%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (51,680)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 3.50% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (45,000)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (46,239)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 5.00% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (36,440)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	5.00%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (40,218)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 5.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (32,580)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	5.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (35,991)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 year) 2.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (28,800)
Description	[1],[3]	Federal National Mortgage Association (15 year)
Rate	[1],[3]	2.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (29,142)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 4.50% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (24,400)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	4.50%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (26,338)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 4.50% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (22,600)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	4.50%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (24,374)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 4.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (21,331)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	4.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (23,034)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (15 year) 3.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (16,880)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (15 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (17,790)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (15 year) 3.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (16,510)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (15 year)
Rate	[1],[3]	3.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (17,092)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 year) 3.50% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (15,000)
Description	[1],[3]	Federal National Mortgage Association (15 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (15,793)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 3.00% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (15,000)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	3.00%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (14,899)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 year) 4.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (11,170)
Description	[1],[3]	Federal National Mortgage Association (15 year)
Rate	[1],[3]	4.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (11,716)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (9,120)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (9,377)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 year) 5.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (6,860)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	5.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (7,705)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 5.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (3,020)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	5.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (3,326)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Government National Mortgage Association (30 Year) 3.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (2,950)
Description	[1],[3]	Government National Mortgage Association (30 year)
Rate	[1],[3]	3.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (3,061)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 3.00% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (2,892)
Description	[1],[3]	Federal National Mortgage Association (30 year)
Rate	[1],[3]	3.00%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (2,880)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Government National Mortgage Association (30 Year) 4.00% 2015-08 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (1,600)
Description	[1],[3]	Government National Mortgage Association (30 year)
Rate	[1],[3]	4.00%
Investments maturity date	[1],[3]	2015-08
Investments sold short, at fair value-	[1],[3]	$ (1,693)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 5.50% 2015-07 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[1],[3]	$ (1,300)
Description	[1],[3]	Federal Home Loan Mortgage Corporation (30 year)
Rate	[1],[3]	5.50%
Investments maturity date	[1],[3]	2015-07
Investments sold short, at fair value-	[1],[3]	$ (1,457)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (213,928)
Description	[4],[6],[7]			Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (228,376)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 3.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (205,082)
Description	[4],[6],[7]			Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			3.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (213,870)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 3.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (146,580)
Description	[4],[6],[7]			Federal National Mortgage Association (15 year)
Rate	[4],[6],[7]			3.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (154,837)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (123,117)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (30 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (131,254)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4.50% 2015-01 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (92,080)
Description	[4],[6],[7]			Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			4.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (99,968)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 5.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (54,100)
Description	[4],[6],[7]			Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			5.00%
Investments maturity date	[4],[6],[7]			2015-02
Investments sold short, at fair value-	[4],[6],[7]			$ (59,698)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 5.00% 2015-01 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (48,150)
Description				Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			5.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (53,193)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (48,800)
Description				Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			4.50%
Investments maturity date	[4],[6],[7]			2015-02
Investments sold short, at fair value-	[4],[6],[7]			$ (52,889)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 3.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (38,360)
Description	[4],[6],[7]			Federal National Mortgage Association (15 year)
Rate	[4],[6],[7]			3.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (39,870)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (36,081)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (30 year)
Rate	[4],[6],[7]			4.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (39,111)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 4.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (26,400)
Description				Federal Home Loan Mortgage Corporation (30 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-02
Investments sold short, at fair value-	[4],[6],[7]			$ (28,071)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 4.00% 2015-02 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (21,840)
Description	[4],[6],[7]			Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-02
Investments sold short, at fair value-	[4],[6],[7]			$ (23,255)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (15 Year) 3.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (20,300)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (15 year)
Rate	[4],[6],[7]			3.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (21,429)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 2.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (15,850)
Description	[4],[6],[7]			Federal National Mortgage Association (15 year)
Rate	[4],[6],[7]			2.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (16,140)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 3.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (14,020)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (30 year)
Rate	[4],[6],[7]			3.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (14,579)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 4.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (7,900)
Description	[4],[6],[7]			Federal National Mortgage Association (15 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-02
Investments sold short, at fair value-	[4],[6],[7]			$ (8,365)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (30 Year) 5.50% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (6,860)
Description	[4],[6],[7]			Federal National Mortgage Association (30 year)
Rate	[4],[6],[7]			5.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (7,673)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 year) 5.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (6,000)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (30 year)
Rate	[4],[6],[7]			5.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (6,622)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (15 Year) 3.00% [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (4,100)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (15 year)
Rate	[4],[6],[7]			3.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (4,256)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal National Mortgage Association (15 Year) 4.00% 2015-01 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (3,270)
Description				Federal National Mortgage Association (15 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (3,465)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (30 Year) 5.50% 2015-01 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (1,300)
Description				Federal Home Loan Mortgage Corporation (30 year)
Rate	[4],[6],[7]			5.50%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (1,453)
Mortgage-related Residential [Member] | North America [Member] | TBA - Fixed Rate Agency Securities Sold Short [Member] | Federal Home Loan Mortgage Corporation (15 Year) 4.00% 2015-01 [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[4],[6],[7]			$ (1,100)
Description	[4],[6],[7]			Federal Home Loan Mortgage Corporation (15 year)
Rate	[4],[6],[7]			4.00%
Investments maturity date	[4],[6],[7]			2015-01
Investments sold short, at fair value-	[4],[6],[7]			$ (1,165)
Government [Member] | North America [Member] | Government debt sold short [Member] | US Treasury Notes Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount		$ (39,000)	[3]	$ (22,485)	[6],[7]
Description		U.S. Treasury Note	[3]	U.S. Treasury Note	[6],[7]
Investments sold short, at fair value-		$ (38,396)	[3]	$ (22,560)	[6],[7]
Government [Member] | North America [Member] | Government debt sold short [Member] | US Treasury Bond Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount	[6],[7]			$ (2,000)
Description	[6],[7]			U.S. Treasury Bond
Rate	[6],[7]			3.13%
Investments maturity date	[6],[7]			2044-08
Investments sold short, at fair value-	[6],[7]			$ (2,149)
Government [Member] | North America [Member] | Government debt sold short [Member] | Minimum [Member] | US Treasury Notes Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Rate		1.25%	[3]	1.25%	[6],[7]
Investments maturity date		2018-10	[3]	2018-10	[6],[7]
Government [Member] | North America [Member] | Government debt sold short [Member] | Maximum [Member] | US Treasury Notes Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Rate		2.25%	[3]	2.25%	[6],[7]
Investments maturity date		2025-05	[3]	2024-11	[6],[7]
Government [Member] | Europe [Member] | Government debt sold short [Member] | Sovereign Debt Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Current Principal/Notional Amount		$ (24,600)	[3]	$ (28,118)	[6],[7]
Description		European Sovereign Bond	[3]	European Sovereign Bonds	[6],[7]
Investments sold short, at fair value-		$ (25,013)	[3]	$ (30,606)	[6],[7]
Government [Member] | Europe [Member] | Government debt sold short [Member] | Minimum [Member] | Sovereign Debt Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Rate		0.25%	[3]	2.75%	[6],[7]
Investments maturity date		2016-09	[3]	2016-09	[6],[7]
Government [Member] | Europe [Member] | Government debt sold short [Member] | Maximum [Member] | Sovereign Debt Securities [Member]
Investments Sold, Not yet Purchased [Line Items]
Rate		4.00%	[3]	4.00%	[6],[7]
Investments maturity date		2019-04	[3]	2019-04	[6],[7]
Financial [Member] | North America [Member] | Common Stock Sold Short [Member] | Publicly Traded Real Estate Investment Trusts [Member]
Investments Sold, Not yet Purchased [Line Items]
Description	[6],[7]			Publicly Traded Real Estate Investment Trusts
Investments sold short, at fair value-	[6],[7]			$ (26,516)
Investment Sold, Not yet Purchased, Balance, Shares	[6],[7]			(2,986)

[1] At June 30, 2015, the Company's short investments guaranteed by the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation represented 114.63% and 28.88% of 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, 2014, the Company's short investments guaranteed by the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation, represented 121.95% and 31.44% of equity, respectively.

[5] Classification percentages are based on Total Equity.

[6] Conformed to current period presentation.

[7] See Note 2 and Note 3 in Notes to Consolidated Financial Statements.