Consolidated Condensed Schedule Of Investments (Repurchase Agreements) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2015		Dec. 31, 2014
Schedule of Investments [Line Items]
Fair value repurchase agreements	[1]	$ 109,591		$ 172,001
Repurchase agreements, cost		110,060		172,001
Repurchase Agreements [Member]
Schedule of Investments [Line Items]
Fair value repurchase agreements		$ 109,591	[2],[3]	$ 172,001	[4],[5],[6]
Investment owned as a percentage of equity		14.45%	[2],[3],[7]	21.81%	[4],[5],[6],[8]
Repurchase agreements, cost		$ 110,060	[2],[3]	$ 172,001	[4],[5],[6]
North America [Member] | Repurchase Agreements [Member]
Schedule of Investments [Line Items]
Fair value repurchase agreements		$ 83,888	[2],[3]	$ 140,248	[4],[5],[6]
Investment owned as a percentage of equity		11.06%	[2],[3],[7]	17.78%	[4],[5],[6],[8]
Repurchase agreements, cost		$ 83,888	[2],[3]	$ 140,248	[4],[5],[6]
Europe [Member] | Repurchase Agreements [Member]
Schedule of Investments [Line Items]
Fair value repurchase agreements		$ 25,703	[2],[3]	$ 31,753	[4],[5],[6]
Investment owned as a percentage of equity		3.39%	[2],[3],[7]	4.03%	[4],[5],[6],[8]
Repurchase agreements, cost		$ 26,172	[2],[3]	$ 31,753	[4],[5],[6]
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized by Par Value $20,550 U.S. Treasury Note, Coupon 2.00% Maturity Date 2025-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	20,344
Securities collateralized by par value	[2],[3]	$ 20,550
Coupon rate on underlying collateral	[2],[3]	2.00%
Maturity date of securities	[2],[3]	2025-08
Rate	[2],[3]	0.07%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 20,344
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized by Par Value $15000 U.S. Treasury Note, Coupon 2.00% Maturity Date 2025-02 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	14,962
Securities collateralized by par value	[2],[3]	$ 15,000
Coupon rate on underlying collateral	[2],[3]	2.00%
Maturity date of securities	[2],[3]	2025-02
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 14,962
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $14,000 U.S. Treasury Note Coupon 1.38% Maturity Date 2020-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	13,982
Securities collateralized by par value	[2],[3]	$ 14,000
Coupon rate on underlying collateral	[2],[3]	1.38%
Maturity date of securities	[2],[3]	2020-09
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 13,982
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $12,000 U.S. Treasury Note Coupon 1.63% Maturity Date 2020-06 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	12,165
Securities collateralized by par value	[2],[3]	$ 12,000
Coupon rate on underlying collateral	[2],[3]	1.63%
Maturity date of securities	[2],[3]	2020-06
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 12,165
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $5000 U.S. Treasury Note Coupon 1.25% Maturity Date 2018-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	5,063
Securities collateralized by par value	[2],[3]	$ 5,000
Coupon rate on underlying collateral	[2],[3]	1.25%
Maturity date of securities	[2],[3]	2018-10
Rate	[2],[3]	0.17%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 5,063
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $4,000 U.S. Treasury Note Coupon 1.50% Maturity Date 2020-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	4,040
Securities collateralized by par value	[2],[3]	$ 4,000
Coupon rate on underlying collateral	[2],[3]	1.50%
Maturity date of securities	[2],[3]	2020-05
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 4,040
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $4000 U.S. Treasury Note Coupon 1.38% Maturity Date 2020-03 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	4,010
Securities collateralized by par value	[2],[3]	$ 4,000
Coupon rate on underlying collateral	[2],[3]	1.38%
Maturity date of securities	[2],[3]	2020-03
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 4,010
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $3200 U.S. Treasury Note Coupon 2.25% Maturity Date 2024-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	3,276
Securities collateralized by par value	[2],[3]	$ 3,200
Coupon rate on underlying collateral	[2],[3]	2.25%
Maturity date of securities	[2],[3]	2024-11
Rate	[2],[3]	0.15%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 3,276
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $2000 U.S. Treasury Note Coupon 2.00% Maturity Date 2022-07 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	2,038
Securities collateralized by par value	[2],[3]	$ 2,000
Coupon rate on underlying collateral	[2],[3]	2.00%
Maturity date of securities	[2],[3]	2022-07
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 2,038
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $2000 U.S. Treasury Note Coupon 2.13% Maturity Date 2025-05 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	2,013
Securities collateralized by par value	[2],[3]	$ 2,000
Coupon rate on underlying collateral	[2],[3]	2.13%
Maturity date of securities	[2],[3]	2025-05
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 2,013
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized by Par Value $2,000 U.S. Treasury Note Coupon 1.25% Maturity Date 2020-01 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	1,995
Securities collateralized by par value	[2],[3]	$ 2,000
Coupon rate on underlying collateral	[2],[3]	1.25%
Maturity date of securities	[2],[3]	2020-01
Rate	[2],[3]	0.20%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 1,995
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Deutsche Bank Securities Collateralized By Par Value $122,870 U.S. Treasury Note, Coupon 1.50% Maturity Date 2019-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			122,256
Securities collateralized by par value	[4],[5],[6]			$ 122,870
Coupon rate on underlying collateral	[4],[5],[6]			1.50%
Maturity date of securities	[4],[5],[6]			2019-11
Rate	[4],[5],[6]			(0.22%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 122,256
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $7,410 U.S. Treasury Note Coupon, 2.25% Maturity Date 2024-11[Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			7,465
Securities collateralized by par value	[4],[5],[6]			$ 7,410
Coupon rate on underlying collateral	[4],[5],[6]			2.25%
Maturity date of securities	[4],[5],[6]			2024-11
Rate	[4],[5],[6]			(0.22%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 7,465
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Pierpont Securities LLC Collateralized By Par Value $5,000 US Treasury Note Coupon, 1.25% Maturity Date 2018-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			4,975
Securities collateralized by par value	[4],[5],[6]			$ 5,000
Coupon rate on underlying collateral	[4],[5],[6]			1.25%
Maturity date of securities	[4],[5],[6]			2018-10
Rate	[4],[5],[6]			(0.10%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 4,975
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Bank of America Collateralized By Par Value $3,354 US Treasury Note Coupon 2.25% Maturity Date 2024-11 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			3,379
Securities collateralized by par value	[4],[5],[6]			$ 3,354
Coupon rate on underlying collateral	[4],[5],[6]			2.25%
Maturity date of securities	[4],[5],[6]			2024-11
Rate	[4],[5],[6]			(0.25%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 3,379
Government [Member] | North America [Member] | Repurchase Agreements [Member] | Pierpont Securities LLC Collateralized By Par Value $2,000 US Treasury Bond Coupon 3.13% Maturity Date 2044-08 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			2,173
Securities collateralized by par value	[4],[5],[6]			$ 2,000
Coupon rate on underlying collateral	[4],[5],[6]			3.13%
Maturity date of securities	[4],[5],[6]			2044-08
Rate	[4],[5],[6]			(0.30%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 2,173
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Barclays Capital Inc. Collateralized By Par Value $15,353 Sovereign Government Bond Coupon 0.25% Maturity Date 2018-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	15,622
Securities collateralized by par value	[2],[3]	$ 15,353
Coupon rate on underlying collateral	[2],[3]	0.25%
Maturity date of securities	[2],[3]	2018-04
Rate	[2],[3]	(0.28%)
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 15,622
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Barclays Capital Inc. Collateralized By Par Value $7,244 Sovereign Government Bond, Coupon 2.75% Maturity Date 2019-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	8,023
Securities collateralized by par value	[2],[3]	$ 7,244
Coupon rate on underlying collateral	[2],[3]	2.75%
Maturity date of securities	[2],[3]	2019-04
Rate	[2],[3]	(0.28%)
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 8,023
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Barclays Capital Inc. Collateralized By Par Value $1,969 Sovereign Government Bond, Coupon 4.00% Maturity Date 2016-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[2],[3]	2,058
Securities collateralized by par value	[2],[3]	$ 1,969
Coupon rate on underlying collateral	[2],[3]	4.00%
Maturity date of securities	[2],[3]	2016-09
Rate	[2],[3]	0.40%
Investments maturity date	[2],[3]	2015-10
Fair value repurchase agreements	[2],[3]	$ 2,058
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Barclays Capital Inc. Collateralized By Par Value $11,508 Sovereign Government Bond, Coupon 2.75% Maturity Date 2019-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			13,090
Securities collateralized by par value	[4],[5],[6]			$ 11,508
Coupon rate on underlying collateral	[4],[5],[6]			2.75%
Maturity date of securities	[4],[5],[6]			2019-04
Rate	[4],[5],[6]			(0.10%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 13,090
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Barclays Capital Inc. Collateralized By Par Value $8,390 Sovereign Government Bond, Coupon 3.75% Maturity Date 2018-10 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			9,712
Securities collateralized by par value	[4],[5],[6]			$ 8,390
Coupon rate on underlying collateral	[4],[5],[6]			3.75%
Maturity date of securities	[4],[5],[6]			2018-10
Rate	[4],[5],[6]			(0.10%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 9,712
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Barclays Capital Inc. Collateralized By Par Value $6,393 Sovereign Government Bond, Coupon 4.00% Maturity Date 2016-09 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			6,888
Securities collateralized by par value	[4],[5],[6]			$ 6,393
Coupon rate on underlying collateral	[4],[5],[6]			4.00%
Maturity date of securities	[4],[5],[6]			2016-09
Rate	[4],[5],[6]			0.15%
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 6,888
Government [Member] | Europe [Member] | Repurchase Agreements [Member] | Deutsche Bank Securities Collateralized By Par Value $1,827 Sovereign Government Bond Coupon 2.75% Maturity Date 2019-04 [Member]
Schedule of Investments [Line Items]
Current Principal/Notional Amount	[4],[5],[6]			2,063
Securities collateralized by par value	[4],[5],[6]			$ 1,827
Coupon rate on underlying collateral	[4],[5],[6]			2.75%
Maturity date of securities	[4],[5],[6]			2019-04
Rate	[4],[5],[6]			(0.10%)
Investments maturity date	[4],[5],[6]			2015-01
Fair value repurchase agreements	[4],[5],[6]			$ 2,063

[1] In the Company's Consolidated Statement of Assets, Liabilities, and Equity, all balances associated with repurchase agreements, reverse repurchase agreements, and financial derivatives are presented on a gross basis.

[2] In general, securities received pursuant to repurchase agreements were delivered to counterparties in short sale transactions.

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

[4] Conformed to current period presentation.

[5] In general, securities received pursuant to repurchase agreements were delivered to counterparties in short sale transactions.

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

[7] Classification percentages are based on Total Equity.

[8] Classification percentages are based on Total Equity.