Consolidated Condensed Schedule of Investments Corporate Notes (Unaudited) (USD $)	Mar. 31, 2014		Dec. 31, 2013
Schedule of Investments [Line Items]
% of Partners' Capital (Net Asset Value)	61.66%		65.15%
Corporate Notes [Member]
Schedule of Investments [Line Items]
Fair Value	$ 322,764,643		$ 377,666,684
% of Partners' Capital (Net Asset Value)	41.30%	[1]	42.89%	[1]
Investment Owned, at Cost	323,682,680		379,319,656
Corporate Notes [Member] | U.S. Corporate Notes [Member]
Schedule of Investments [Line Items]
Fair Value	221,116,497		250,957,531
% of Partners' Capital (Net Asset Value)	28.29%	[1]	28.50%	[1]
Investment Owned, at Cost	221,708,345		252,246,718
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Aerospace [Member] | 4.95% BAE Systems Holdings Inc.Due 2014-06-01 [Member]
Schedule of Investments [Line Items]
Face Value	1,240,000		1,240,000
Fair Value	1,268,895		1,266,529
% of Partners' Capital (Net Asset Value)	0.16%	[1]	0.14%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Aerospace [Member] | 0.58% Rockwell Collins, Inc.Due 2016-12-15 [Member]
Schedule of Investments [Line Items]
Face Value	2,800,000
Fair Value	2,810,201
% of Partners' Capital (Net Asset Value)	0.36%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Aerospace [Member] | 0.59% Rockwell Collins, Inc.Due 2016-12-15 [Member]
Schedule of Investments [Line Items]
Face Value			2,800,000
Fair Value			2,805,386
% of Partners' Capital (Net Asset Value)			0.32%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 4.50% Bank of America Due 2015-04-01 [Member]
Schedule of Investments [Line Items]
Face Value	2,250,000		2,250,000
Fair Value	2,385,000		2,378,565
% of Partners' Capital (Net Asset Value)	0.31%	[1]	0.27%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.05% Bank of America Corporation Due 2016-03-22 [Member]
Schedule of Investments [Line Items]
Face Value	3,750,000
Fair Value	3,769,628
% of Partners' Capital (Net Asset Value)	0.48%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 3.10% Bank of New York Mellon Due 2015-01-15 [Member]
Schedule of Investments [Line Items]
Face Value	3,500,000
Fair Value	3,597,911
% of Partners' Capital (Net Asset Value)	0.46%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.20% Bank of New York Mellon Due 2015-02-20 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000		2,000,000
Fair Value	2,016,867		2,024,095
% of Partners' Capital (Net Asset Value)	0.26%	[1]	0.23%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.30% Citigroup Inc.Due 2016-04-01 [Member]
Schedule of Investments [Line Items]
Face Value	8,000,000		8,000,000
Fair Value	8,074,080		8,052,560
% of Partners' Capital (Net Asset Value)	1.03%	[1]	0.91%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 3.00% Comerica Incorporated Due 2015-09-16 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000
Fair Value	2,068,868
% of Partners' Capital (Net Asset Value)	0.26%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.64% Fifth Third Bank Due 2016-02-26 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000
Fair Value	1,002,549
% of Partners' Capital (Net Asset Value)	0.13%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.64% Goldman Sachs Group, Inc.Due 2015-07-22 [Member]
Schedule of Investments [Line Items]
Face Value	9,250,000		9,250,000
Fair Value	9,263,145		9,232,548
% of Partners' Capital (Net Asset Value)	1.19%	[1]	1.05%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.85% JPMorgan Chase & Co.Due 2016-02-26 [Member]
Schedule of Investments [Line Items]
Face Value	10,275,000
Fair Value	10,324,391
% of Partners' Capital (Net Asset Value)	1.32%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.72% Morgan Stanley Due 2015-10-15 [Member]
Schedule of Investments [Line Items]
Face Value	7,500,000		7,500,000
Fair Value	7,512,133		7,506,959
% of Partners' Capital (Net Asset Value)	0.96%	[1]	0.85%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 4.63% Northern Trust Corporation Due 2014-05-01 [Member]
Schedule of Investments [Line Items]
Face Value	2,641,000		2,641,000
Fair Value	2,702,194		2,699,554
% of Partners' Capital (Net Asset Value)	0.35%	[1]	0.31%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.29% U.S. Bank National Association Due 2015-10-01 [Member]
Schedule of Investments [Line Items]
Face Value	2,500,000
Fair Value	2,500,652
% of Partners' Capital (Net Asset Value)	0.32%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.25% Wells Fargo & Company Due 2015-02-13 [Member]
Schedule of Investments [Line Items]
Face Value	2,515,000		4,815,000
Fair Value	2,538,673		4,877,825
% of Partners' Capital (Net Asset Value)	0.32%	[1]	0.55%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.52% Wells Fargo Bank Due 2015-07-20 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000		1,500,000
Fair Value	1,505,197		1,503,866
% of Partners' Capital (Net Asset Value)	0.19%	[1]	0.17%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.07% Bank of America Corporation Due 2016-03-22 [Member]
Schedule of Investments [Line Items]
Face Value			3,750,000
Fair Value			3,781,374
% of Partners' Capital (Net Asset Value)			0.43%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.18% Citigroup Inc.Due 2014-04-01 [Member]
Schedule of Investments [Line Items]
Face Value			189,000
Fair Value			189,567
% of Partners' Capital (Net Asset Value)			0.02%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 1.24% Goldman Sachs Group, Inc.Due 2014-02-07 [Member]
Schedule of Investments [Line Items]
Face Value			2,460,000
Fair Value			2,466,374
% of Partners' Capital (Net Asset Value)			0.28%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 0.86% JPMorgan Chase & Co.Due 2016-02-26 [Member]
Schedule of Investments [Line Items]
Face Value			10,275,000
Fair Value			10,319,661
% of Partners' Capital (Net Asset Value)			1.18%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Banks [Member] | 3.1% The Bank of New York Mellon Due 2015-01-15 [Member]
Schedule of Investments [Line Items]
Face Value			3,500,000
Fair Value			3,644,296
% of Partners' Capital (Net Asset Value)			0.41%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Beverages [Member] | 1.13% Anheuser Busch Inbev Fin, Inc.Due 2017-01-27 [Member]
Schedule of Investments [Line Items]
Face Value	9,220,000
Fair Value	9,244,802
% of Partners' Capital (Net Asset Value)	1.18%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Beverages [Member] | 1.50% Anheuser-Busch In Bev Worldwide Inc. Due 2014-07-14 [Member]
Schedule of Investments [Line Items]
Face Value	2,750,000		2,750,000
Fair Value	2,766,592		2,784,802
% of Partners' Capital (Net Asset Value)	0.35%	[1]	0.32%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Beverages [Member] | 0.80% Anheuser-Busch InBev Worldwide Inc.Due 2015-07-15 [Member]
Schedule of Investments [Line Items]
Face Value			6,650,000
Fair Value			6,705,121
% of Partners' Capital (Net Asset Value)			0.76%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Biotechnology and Specialty Chemicals [Member] | 1.88% Amgen Inc.Due 2014-11-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000		1,500,000
Fair Value	1,522,374		1,520,308
% of Partners' Capital (Net Asset Value)	0.19%	[1]	0.17%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Biotechnology and Specialty Chemicals [Member] | 2.4% Gilead Sciences, Inc.Due 2014-12-01 [Member]
Schedule of Investments [Line Items]
Face Value	5,350,000		8,450,000
Fair Value	5,463,901		8,612,409
% of Partners' Capital (Net Asset Value)	0.70%	[1]	0.98%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Biotechnology and Specialty Chemicals [Member] | 2.38% Ecolab Inc.Due 2014-12-08 [Member]
Schedule of Investments [Line Items]
Face Value	1,400,000
Fair Value	1,427,955
% of Partners' Capital (Net Asset Value)	0.18%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Computers [Member] | 0.63% Hewlett-Packard Company Due 2014-05-30 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000
Fair Value	1,001,163
% of Partners' Capital (Net Asset Value)	0.13%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Computers [Member] | 1.78% Hewlett-Packard Company Due 2014-09-19 [Member]
Schedule of Investments [Line Items]
Face Value	3,850,000
Fair Value	3,872,116
% of Partners' Capital (Net Asset Value)	0.50%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Computers [Member] | 0.30% IBM Due 2016-02-05 [Member]
Schedule of Investments [Line Items]
Face Value	3,000,000
Fair Value	3,002,856
% of Partners' Capital (Net Asset Value)	0.38%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Computers [Member] | 0.64% Hewlett-Packard Company Due 2014-05-30 [Member]
Schedule of Investments [Line Items]
Face Value			4,500,000
Fair Value			4,496,825
% of Partners' Capital (Net Asset Value)			0.51%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Computers [Member] | 1.79% Hewlett-Packard Company Due 2014-09-19 [Member]
Schedule of Investments [Line Items]
Face Value			3,850,000
Fair Value			3,884,488
% of Partners' Capital (Net Asset Value)			0.44%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 5.13% American Express Credit Corporation Due 2014-08-25 [Member]
Schedule of Investments [Line Items]
Face Value	2,500,000		2,500,000
Fair Value	2,559,457		2,620,966
% of Partners' Capital (Net Asset Value)	0.33%	[1]	0.30%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.36% American Honda Finance Corporation Due 2014-04-08 [Member]
Schedule of Investments [Line Items]
Face Value	4,500,000
Fair Value	4,503,911
% of Partners' Capital (Net Asset Value)	0.58%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 1% American Honda Finance Corporation Due 2015-08-11 [Member]
Schedule of Investments [Line Items]
Face Value	3,750,000		3,750,000
Fair Value	3,776,058		3,780,183
% of Partners' Capital (Net Asset Value)	0.48%	[1]	0.43%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 1.3% Daimler Finance North America LLC Due 2015-07-31 [Member]
Schedule of Investments [Line Items]
Face Value	8,300,000
Fair Value	8,389,746
% of Partners' Capital (Net Asset Value)	1.07%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 4.88% General Electric Capital Corporation Due 2015-03-04 [Member]
Schedule of Investments [Line Items]
Face Value	1,750,000		1,750,000
Fair Value	1,829,401		1,865,951
% of Partners' Capital (Net Asset Value)	0.23%	[1]	0.21%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 1.63% General Electric Capital Corporation Due 2015-07-02 [Member]
Schedule of Investments [Line Items]
Face Value	3,500,000		3,500,000
Fair Value	3,561,629		3,585,158
% of Partners' Capital (Net Asset Value)	0.46%	[1]	0.41%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.34% John Deere Capital Corporation Due 2014-10-08 [Member]
Schedule of Investments [Line Items]
Face Value	800,000		800,000
Fair Value	801,100		801,093
% of Partners' Capital (Net Asset Value)	0.10%	[1]	0.09%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 2.95% John Deere Capital Corporation Due 2015-03-09 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000		1,500,000
Fair Value	1,539,568		1,556,997
% of Partners' Capital (Net Asset Value)	0.20%	[1]	0.18%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.35% John Deere Capital Corporation Due 2015-06-15 [Member]
Schedule of Investments [Line Items]
Face Value	2,400,000
Fair Value	2,401,832
% of Partners' Capital (Net Asset Value)	0.31%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 2.88% MassMutual Global Funding II Due 2014-04-21 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000		1,000,000
Fair Value	1,014,028		1,013,309
% of Partners' Capital (Net Asset Value)	0.13%	[1]	0.12%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 4.5% Nissan Motor Acceptance Corporation Due 2015-01-30 [Member]
Schedule of Investments [Line Items]
Face Value	1,400,000
Fair Value	1,455,826
% of Partners' Capital (Net Asset Value)	0.19%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.38% Toyota Motor Credit Corporation Due 2015-09-18 [Member]
Schedule of Investments [Line Items]
Face Value	1,700,000
Fair Value	1,701,552
% of Partners' Capital (Net Asset Value)	0.22%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 3% American International Group, Inc.Due 2015-03-20 [Member]
Schedule of Investments [Line Items]
Face Value			11,122,000
Fair Value			11,529,028
% of Partners' Capital (Net Asset Value)			1.32%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 3.20% Berkshire Hathaway Inc.Due 2015-02-11 [Member]
Schedule of Investments [Line Items]
Face Value			1,500,000
Fair Value			1,564,714
% of Partners' Capital (Net Asset Value)			0.18%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 5.45% Pricoa Global Funding I Due 2014-06-11 [Member]
Schedule of Investments [Line Items]
Face Value			4,450,000
Fair Value			4,558,646
% of Partners' Capital (Net Asset Value)			0.52%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 5.5% Travelers Companies, Inc.Due 2015-12-01 [Member]
Schedule of Investments [Line Items]
Face Value			2,498,000
Fair Value			2,736,470
% of Partners' Capital (Net Asset Value)			0.31%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.37% American Honda Finance Corp.Due 2014-04-08 [Member]
Schedule of Investments [Line Items]
Face Value			4,500,000
Fair Value			4,505,258
% of Partners' Capital (Net Asset Value)			0.51%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 5.75% CME Group Inc.Due 2014-02-15 [Member]
Schedule of Investments [Line Items]
Face Value			500,000
Fair Value			513,792
% of Partners' Capital (Net Asset Value)			0.06%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 2.25% ERAC USA Finance LLC Due 2014-01-10 [Member]
Schedule of Investments [Line Items]
Face Value			1,860,000
Fair Value			1,880,442
% of Partners' Capital (Net Asset Value)			0.21%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.44% General Electric Capital Corporation Due 2016-01-08 [Member]
Schedule of Investments [Line Items]
Face Value			5,000,000
Fair Value			4,989,578
% of Partners' Capital (Net Asset Value)			0.57%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.36% John Deere Capital Corporation Due 2015-06-15 [Member]
Schedule of Investments [Line Items]
Face Value			2,400,000
Fair Value			2,401,102
% of Partners' Capital (Net Asset Value)			0.27%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.60% Jackson National Life Global Funding Due 2015-09-30 [Member]
Schedule of Investments [Line Items]
Face Value			4,000,000
Fair Value			4,011,869
% of Partners' Capital (Net Asset Value)			0.46%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.51% Pricoa Global Funding I Due 2015-08-19 [Member]
Schedule of Investments [Line Items]
Face Value			600,000
Fair Value			601,286
% of Partners' Capital (Net Asset Value)			0.07%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Diversified Financial Services [Member] | 0.4% Principal Life Global Funding II Due 2014-09-19 [Member]
Schedule of Investments [Line Items]
Face Value			1,000,000
Fair Value			1,000,999
% of Partners' Capital (Net Asset Value)			0.11%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Electronics [Member] | 0.29% Honeywell International Inc.Due 2015-11-17 [Member]
Schedule of Investments [Line Items]
Face Value	1,350,000		1,350,000
Fair Value	1,350,456		1,350,416
% of Partners' Capital (Net Asset Value)	0.17%	[1]	0.15%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 5% 177293 Canada Ltd.Due 2014-11-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,100,000		1,100,000
Fair Value	1,150,192		1,147,025
% of Partners' Capital (Net Asset Value)	0.15%	[1]	0.13%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 4.95% Atmos Energy Corporation Due 2014-10-15 [Member]
Schedule of Investments [Line Items]
Face Value	400,000		400,000
Fair Value	418,496		417,407
% of Partners' Capital (Net Asset Value)	0.05%	[1]	0.05%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 7.63% DTE Energy Company Due 2014-05-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,730,000		1,730,000
Fair Value	1,793,907		1,790,737
% of Partners' Capital (Net Asset Value)	0.23%	[1]	0.20%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 0.38% Duke Energy Ohio, Inc.Due 2015-03-06 [Member]
Schedule of Investments [Line Items]
Face Value	1,273,000		1,273,000
Fair Value	1,274,463		1,273,979
% of Partners' Capital (Net Asset Value)	0.16%	[1]	0.14%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 1.88% Entergy Louisiana, LLC Due 2014-12-15 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000
Fair Value	2,030,552
% of Partners' Capital (Net Asset Value)	0.26%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 1.61% NextEra Energy Capital Holdings, Inc. Due 2014-06-01 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000
Fair Value	2,014,568
% of Partners' Capital (Net Asset Value)	0.26%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 3.55% Niagara Mohawk Power Corporation Due 2014-10-01 [Member]
Schedule of Investments [Line Items]
Face Value	1,370,000		1,370,000
Fair Value	1,415,331		1,411,772
% of Partners' Capital (Net Asset Value)	0.18%	[1]	0.16%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 1.95% Phillips 66 Due 2015-03-05 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000
Fair Value	1,013,170
% of Partners' Capital (Net Asset Value)	0.13%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 5% Public Service Electric and Gas Company Due 2014-08-15 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000		2,000,000
Fair Value	2,047,214		2,093,454
% of Partners' Capital (Net Asset Value)	0.26%	[1]	0.24%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 0.85% Public Service Electric and Gas Company Due 2014-08-15 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000		2,000,000
Fair Value	2,005,876		2,012,144
% of Partners' Capital (Net Asset Value)	0.26%	[1]	0.23%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 2.95% Spectra Energy Partners, LP Due 2016-06-15 [Member]
Schedule of Investments [Line Items]
Face Value	5,000,000
Fair Value	5,228,581
% of Partners' Capital (Net Asset Value)	0.67%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 0.25% NextEra Energy Capital Holdings, Inc. Due 2014-04-21 [Member]
Schedule of Investments [Line Items]
Face Value			2,000,000
Fair Value			2,011,605
% of Partners' Capital (Net Asset Value)			0.23%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 5.80% Arizona Public Service Company Due 2014-06-30 [Member]
Schedule of Investments [Line Items]
Face Value			640,000
Fair Value			655,732
% of Partners' Capital (Net Asset Value)			0.07%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 5.35% Exelon Generation Company, LLC Due 2014-01-15 [Member]
Schedule of Investments [Line Items]
Face Value			1,855,000
Fair Value			1,904,064
% of Partners' Capital (Net Asset Value)			0.22%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Energy [Member] | 1% Sempra Energy Due 2014-03-15 [Member]
Schedule of Investments [Line Items]
Face Value			2,328,000
Fair Value			2,332,395
% of Partners' Capital (Net Asset Value)			0.26%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Food [Member] | 1.63% Kraft Foods Group, Inc.Due 2015-06-04 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000		6,000,000
Fair Value	2,034,342		6,090,293
% of Partners' Capital (Net Asset Value)	0.26%	[1]	0.69%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Food [Member] | 0.80% Kroger Co.Due 2016-10-17 [Member]
Schedule of Investments [Line Items]
Face Value	4,500,000		4,500,000
Fair Value	4,513,102		4,499,780
% of Partners' Capital (Net Asset Value)	0.58%	[1]	0.51%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | HealthCare [Member] | 0.41% Baxter International Inc.Due 2014-12-11 [Member]
Schedule of Investments [Line Items]
Face Value	600,000		600,000
Fair Value	600,803		600,903
% of Partners' Capital (Net Asset Value)	0.08%	[1]	0.07%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | HealthCare [Member] | 3% Medtronic, Inc.Due 2015-03-15 [Member]
Schedule of Investments [Line Items]
Face Value	3,500,000		3,500,000
Fair Value	3,591,873		3,642,140
% of Partners' Capital (Net Asset Value)	0.46%	[1]	0.41%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | HealthCare [Member] | 1.40% Zimmer Holdings, Inc.Due 2014-11-30 [Member]
Schedule of Investments [Line Items]
Face Value	1,050,000		675,000
Fair Value	1,059,895		680,182
% of Partners' Capital (Net Asset Value)	0.14%	[1]	0.08%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 3% American International Group, Inc.Due 2015-03-20 [Member]
Schedule of Investments [Line Items]
Face Value	11,122,000
Fair Value	11,403,683
% of Partners' Capital (Net Asset Value)	1.45%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 3.20% Berkshire Hathaway Inc.Due 2015-02-11 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000
Fair Value	1,543,589
% of Partners' Capital (Net Asset Value)	0.20%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 0.58% Jackson National Life Global Funding Due 2015-09-30 [Member]
Schedule of Investments [Line Items]
Face Value	4,000,000
Fair Value	4,013,813
% of Partners' Capital (Net Asset Value)	0.51%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 5.45% Pricoa Global Funding I Due 2014-06-11 [Member]
Schedule of Investments [Line Items]
Face Value	4,450,000
Fair Value	4,566,549
% of Partners' Capital (Net Asset Value)	0.58%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 0.51% Pricoa Global Funding IDue 2014-06-11 [Member]
Schedule of Investments [Line Items]
Face Value	600,000
Fair Value	601,478
% of Partners' Capital (Net Asset Value)	0.08%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 0.39% Principal Life Global Funding II Due 2014-09-19 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000
Fair Value	1,000,748
% of Partners' Capital (Net Asset Value)	0.13%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Insurance [Member] | 5.5% Travelers Companies, Inc.Due 2015-12-01 [Member]
Schedule of Investments [Line Items]
Face Value	2,498,000
Fair Value	2,741,011
% of Partners' Capital (Net Asset Value)	0.35%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Manufacturing [Member] | 0.31% Caterpillar Financial Services Corporation Due 2015-02-19 [Member]
Schedule of Investments [Line Items]
Face Value	600,000
Fair Value	600,363
% of Partners' Capital (Net Asset Value)	0.08%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Manufacturing [Member] | 0.95% Eaton Corporation Due 2015-11-02 [Member]
Schedule of Investments [Line Items]
Face Value	4,000,000		4,000,000
Fair Value	4,032,768		4,021,548
% of Partners' Capital (Net Asset Value)	0.52%	[1]	0.46%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Manufacturing [Member] | 0.85% General Electric Company Due 2015-10-09 [Member]
Schedule of Investments [Line Items]
Face Value	3,750,000		3,750,000
Fair Value	3,781,167		3,776,423
% of Partners' Capital (Net Asset Value)	0.48%	[1]	0.43%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Media [Member] | 3.65% NBC Universal Media, LLC Due 2015-04-30 [Member]
Schedule of Investments [Line Items]
Face Value	2,900,000		2,900,000
Fair Value	3,046,507		3,037,184
% of Partners' Capital (Net Asset Value)	0.39%	[1]	0.34%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Media [Member] | 0.78% NBC Universal Media, LLC Due 2016-04-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,445,000		1,445,000
Fair Value	1,448,523		1,448,195
% of Partners' Capital (Net Asset Value)	0.19%	[1]	0.16%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Media [Member] | 4.38% Viacom Inc.Due 2014-09-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,150,000		1,150,000
Fair Value	1,171,923		1,194,807
% of Partners' Capital (Net Asset Value)	0.15%	[1]	0.14%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Media [Member] | 0.23% Walt Disney Company Due 2015-02-11
Schedule of Investments [Line Items]
Face Value	4,600,000		4,600,000
Fair Value	4,601,516		4,600,598
% of Partners' Capital (Net Asset Value)	0.59%	[1]	0.52%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Pharmaceutical [Member] | 2.10% Express Scripts Holding Company Due 2015-02-12 [Member]
Schedule of Investments [Line Items]
Face Value	975,000		975,000
Fair Value	990,998		997,404
% of Partners' Capital (Net Asset Value)	0.13%	[1]	0.11%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Pharmaceutical [Member] | 1.00% AbbVie Inc.Due 2015-11-06 [Member]
Schedule of Investments [Line Items]
Face Value			5,150,000
Fair Value			5,197,960
% of Partners' Capital (Net Asset Value)			0.59%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Pharmaceutical [Member] | 4.13% Novartis Capital Corporation Due 2014-02-10 [Member]
Schedule of Investments [Line Items]
Face Value			4,275,000
Fair Value			4,362,322
% of Partners' Capital (Net Asset Value)			0.50%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | REIT [Member] | 5.63% Simon Property Group, L.P.Due 2014-08-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000		1,000,000
Fair Value	1,026,084		1,044,933
% of Partners' Capital (Net Asset Value)	0.13%	[1]	0.12%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | REIT [Member] | 6.75% Simon Property Group, L.P.Due 2014-05-15 [Member]
Schedule of Investments [Line Items]
Face Value			2,400,000
Fair Value			2,437,512
% of Partners' Capital (Net Asset Value)			0.28%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Retail [Member] | 5.75% Macy’s, Inc.Due 2014-07-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,400,000
Fair Value	1,436,830
% of Partners' Capital (Net Asset Value)	0.18%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Retail [Member] | 6.5% AutoZone, Inc.Due 2014-01-15 [Member]
Schedule of Investments [Line Items]
Face Value			1,800,000
Fair Value			1,857,458
% of Partners' Capital (Net Asset Value)			0.21%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 0.88% AT&T Inc.Due 2015-02-13 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000		8,050,000
Fair Value	1,507,622		8,127,393
% of Partners' Capital (Net Asset Value)	0.19%	[1]	0.92%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 2.50% AT&T Inc.Due 2015-08-15 [Member]
Schedule of Investments [Line Items]
Face Value	1,040,000		1,040,000
Fair Value	1,069,166		1,077,586
% of Partners' Capital (Net Asset Value)	0.14%	[1]	0.12%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 0.29% Cisco Systems, Inc.Due 2015-09-03 [Member]
Schedule of Investments [Line Items]
Face Value	3,000,000
Fair Value	2,999,404
% of Partners' Capital (Net Asset Value)	0.38%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 0.21% Verizon Communications Inc. Due 2014-01-24 [Member]
Schedule of Investments [Line Items]
Face Value	8,575,000
Fair Value	8,813,683
% of Partners' Capital (Net Asset Value)	1.13%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 5.10% AT&T Inc.Due 2014-09-15 [Member]
Schedule of Investments [Line Items]
Face Value			960,000
Fair Value			1,005,014
% of Partners' Capital (Net Asset Value)			0.11%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 0.86% Verizon Communications Inc.Due 2014-03-28 [Member]
Schedule of Investments [Line Items]
Face Value			2,250,000
Fair Value			2,253,042
% of Partners' Capital (Net Asset Value)			0.26%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 0.44% Verizon Communications Inc.Due 2015-03-06 [Member]
Schedule of Investments [Line Items]
Face Value			4,575,000
Fair Value			4,570,512
% of Partners' Capital (Net Asset Value)			0.52%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Telecommunications [Member] | 1.77% Verizon Communications Inc.Due 2016-09-15 [Member]
Schedule of Investments [Line Items]
Face Value			4,000,000
Fair Value			4,128,792
% of Partners' Capital (Net Asset Value)			0.47%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Automotive [Member] | 1.3% Daimler Finance North America LLC Due 2015-07-31 [Member]
Schedule of Investments [Line Items]
Face Value			8,300,000
Fair Value			8,407,757
% of Partners' Capital (Net Asset Value)			0.95%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Automotive [Member] | 1.95% Daimler Finance North America LLC Due 2014-03-28 [Member]
Schedule of Investments [Line Items]
Face Value			2,500,000
Fair Value			2,518,789
% of Partners' Capital (Net Asset Value)			0.29%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Automotive [Member] | 1.75% Johnson Controls, Inc.Due 2014-03-01 [Member]
Schedule of Investments [Line Items]
Face Value			1,805,000
Fair Value			1,819,497
% of Partners' Capital (Net Asset Value)			0.21%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Automotive [Member] | 0.39% Toyota Motor Credit Corporation Due 2015-09-18 [Member]
Schedule of Investments [Line Items]
Face Value			1,700,000
Fair Value			1,700,853
% of Partners' Capital (Net Asset Value)			0.19%	[1]
Corporate Notes [Member] | U.S. Corporate Notes [Member] | Mining [Member] | 8.95% Rio Tinto Finance (USA) Limited Due 2014-05-01 [Member]
Schedule of Investments [Line Items]
Face Value			1,140,000
Fair Value			1,187,971
% of Partners' Capital (Net Asset Value)			0.13%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member]
Schedule of Investments [Line Items]
Fair Value	101,648,146		126,709,153
% of Partners' Capital (Net Asset Value)	13.01%	[1]	14.39%	[1]
Investment Owned, at Cost	101,974,335		127,072,938
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 3.88% Abbey National Treasury Services PLC Due 2014-11-10 [Member]
Schedule of Investments [Line Items]
Face Value	2,200,000
Fair Value	2,278,338
% of Partners' Capital (Net Asset Value)	0.29%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 3.70% Australia and New Zealand Banking Group Ltd Due 2015-01-13 [Member]
Schedule of Investments [Line Items]
Face Value	1,000,000		1,000,000
Fair Value	1,033,374		1,049,841
% of Partners' Capital (Net Asset Value)	0.13%	[1]	0.12%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.44% Australia and New Zealand Banking Group Ltd Due 2015-05-07 [Member]
Schedule of Investments [Line Items]
Face Value	3,950,000		3,950,000
Fair Value	3,959,181		3,955,928
% of Partners' Capital (Net Asset Value)	0.51%	[1]	0.45%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.48% Bank of Montreal Due 2015-09-24 [Member]
Schedule of Investments [Line Items]
Face Value	4,100,000
Fair Value	4,104,225
% of Partners' Capital (Net Asset Value)	0.53%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 5.2% Barclays Bank PLC Due 2014-07-10 [Member]
Schedule of Investments [Line Items]
Face Value	1,800,000		1,800,000
Fair Value	1,844,613		1,889,402
% of Partners' Capital (Net Asset Value)	0.24%	[1]	0.21%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.15% Commonwealth Bank of Australia Due 2014-01-06 [Member]
Schedule of Investments [Line Items]
Face Value	4,740,000		2,740,000
Fair Value	4,884,341		2,863,444
% of Partners' Capital (Net Asset Value)	0.62%	[1]	0.33%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 1.29% Danske Bank A/S Due 2014-04-14 [Member]
Schedule of Investments [Line Items]
Face Value	5,000,000		5,000,000
Fair Value	5,016,313		5,020,114
% of Partners' Capital (Net Asset Value)	0.64%	[1]	0.57%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 2.38% ING Bank N.V.Due 2014-06-09 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000		1,500,000
Fair Value	1,516,807		1,514,839
% of Partners' Capital (Net Asset Value)	0.19%	[1]	0.17%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 2.00% ING Bank N.V.Due 2015-09-25 [Member]
Schedule of Investments [Line Items]
Face Value	5,350,000		5,350,000
Fair Value	5,433,692		5,458,302
% of Partners' Capital (Net Asset Value)	0.70%	[1]	0.62%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 1.87% ING Bank N.V.Due 2015-09-25 [Member]
Schedule of Investments [Line Items]
Face Value	3,050,000
Fair Value	3,103,876
% of Partners' Capital (Net Asset Value)	0.40%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 2.25% National Australia Bank Limited Due 2014-04-11 [Member]
Schedule of Investments [Line Items]
Face Value	1,175,000		1,175,000
Fair Value	1,188,008		1,187,388
% of Partners' Capital (Net Asset Value)	0.15%	[1]	0.13%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.16% Nordea Bank AB Due 2014-06-02 [Member]
Schedule of Investments [Line Items]
Face Value	600,000		600,000
Fair Value	611,431		615,818
% of Partners' Capital (Net Asset Value)	0.08%	[1]	0.07%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.28%Rabobank Nederland Due 2015-02-25 [Member]
Schedule of Investments [Line Items]
Face Value	2,000,000		2,000,000
Fair Value	2,040,920		2,038,986
% of Partners' Capital (Net Asset Value)	0.26%	[1]	0.23%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 3.20% Rabobank Nederland Due 2015-03-11 [Member]
Schedule of Investments [Line Items]
Face Value	3,431,000		3,431,000
Fair Value	3,529,064		3,571,331
% of Partners' Capital (Net Asset Value)	0.45%	[1]	0.41%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.71% Rabobank Nederland Due 2016-03-18 [Member]
Schedule of Investments [Line Items]
Face Value	3,650,000
Fair Value	3,667,440
% of Partners' Capital (Net Asset Value)	0.47%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 5.50% Standard Chartered PLC Due 2014-11-18 [Member]
Schedule of Investments [Line Items]
Face Value	4,190,000		4,190,000
Fair Value	4,405,447		4,386,735
% of Partners' Capital (Net Asset Value)	0.56%	[1]	0.50%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.42% Toronto-Dominion Bank Due 2015-05-01 [Member]
Schedule of Investments [Line Items]
Face Value	5,000,000		5,000,000
Fair Value	5,012,435		5,007,986
% of Partners' Capital (Net Asset Value)	0.64%	[1]	0.57%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 3.88% UBS AG Due 2015-01-15 [Member]
Schedule of Investments [Line Items]
Face Value	2,200,000		2,200,000
Fair Value	2,277,043		2,313,791
% of Partners' Capital (Net Asset Value)	0.29%	[1]	0.26%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 1.04% HSBC Bank PLC Due 2014-01-17 [Member]
Schedule of Investments [Line Items]
Face Value			400,000
Fair Value			401,025
% of Partners' Capital (Net Asset Value)			0.04%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 1.64% ING Bank N.V.Due 2014-06-09 [Member]
Schedule of Investments [Line Items]
Face Value			4,000,000
Fair Value			4,025,891
% of Partners' Capital (Net Asset Value)			0.46%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 1.89% ING Bank N.V.Due 2015-09-25 [Member]
Schedule of Investments [Line Items]
Face Value			3,050,000
Fair Value			3,111,067
% of Partners' Capital (Net Asset Value)			0.35%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.72% Rabobank Nederland Due 2016-03-18 [Member]
Schedule of Investments [Line Items]
Face Value			7,650,000
Fair Value			7,679,537
% of Partners' Capital (Net Asset Value)			0.87%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Banks [Member] | 0.50% Bank of Montreal Due 2015-09-24 [Member]
Schedule of Investments [Line Items]
Face Value			4,100,000
Fair Value			4,102,607
% of Partners' Capital (Net Asset Value)			0.47%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 3.88% BP Capital Markets P.L.C.Due 2015-03-10 [Member]
Schedule of Investments [Line Items]
Face Value	2,100,000
Fair Value	2,173,931
% of Partners' Capital (Net Asset Value)	0.28%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 3.20% BP Capital Markets P.L.C.Due 2016-03-11 [Member]
Schedule of Investments [Line Items]
Face Value	3,400,000
Fair Value	3,568,122
% of Partners' Capital (Net Asset Value)	0.46%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 1.13% CNOOC Finance (2013) Limited Due 2016-05-09 [Member]
Schedule of Investments [Line Items]
Face Value	4,800,000		4,800,000
Fair Value	4,781,124		4,802,760
% of Partners' Capital (Net Asset Value)	0.61%	[1]	0.55%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 0.88% TransCanada PipeLines Limited Due 2015-03-02 [Member]
Schedule of Investments [Line Items]
Face Value	1,500,000		1,500,000
Fair Value	1,507,003		1,508,699
% of Partners' Capital (Net Asset Value)	0.19%	[1]	0.17%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 1.45% Canadian Natural Resources Ltd Due 2014-11-14 [Member]
Schedule of Investments [Line Items]
Face Value			8,600,000
Fair Value			8,673,728
% of Partners' Capital (Net Asset Value)			0.99%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 0.48% Electricite de France Due 2015-01-02 [Member]
Schedule of Investments [Line Items]
Face Value			1,000,000
Fair Value			1,026,421
% of Partners' Capital (Net Asset Value)			0.12%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Energy [Member] | 4.75% EOG Resources Canada Inc.Due 2014-03-15 [Member]
Schedule of Investments [Line Items]
Face Value			3,602,000
Fair Value			3,685,544
% of Partners' Capital (Net Asset Value)			0.42%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Food [Member] | 2% Tesco PLC Due 2014-12-05 [Member]
Schedule of Investments [Line Items]
Face Value	600,000		600,000
Fair Value	609,139		608,424
% of Partners' Capital (Net Asset Value)	0.08%	[1]	0.07%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | HealthCare [Member] | 1.35% Covidien International Finance S.A.Due 2015-05-29 [Member]
Schedule of Investments [Line Items]
Face Value	2,550,000
Fair Value	2,582,176
% of Partners' Capital (Net Asset Value)	0.33%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Pharmaceutical [Member] | 1.03% Takeda Pharmaceutical Co Ltd Due 2015-03-17 [Member]
Schedule of Investments [Line Items]
Face Value	10,150,000		10,150,000
Fair Value	10,193,735		10,240,862
% of Partners' Capital (Net Asset Value)	1.30%	[1]	1.16%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Pharmaceutical [Member] | 0.75% Teva Pharmaceutical Finance III BV Due 2014-03-21 [Member]
Schedule of Investments [Line Items]
Face Value			8,500,000
Fair Value			8,513,655
% of Partners' Capital (Net Asset Value)			0.97%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Telecommunications [Member] | 3.73% Telefonica Emisiones, S.A.U.Due 2015-04-27 [Member]
Schedule of Investments [Line Items]
Face Value	4,850,000
Fair Value	5,072,187
% of Partners' Capital (Net Asset Value)	0.65%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Telecommunications [Member] | 5.50% America Movil, S.A.B. de C.V.Due 2014-03-01 [Member]
Schedule of Investments [Line Items]
Face Value			1,815,000
Fair Value			1,862,021
% of Partners' Capital (Net Asset Value)			0.21%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Telecommunications [Member] | 4.38% Orange Due 2014-07-08 [Member]
Schedule of Investments [Line Items]
Face Value			2,270,000
Fair Value			2,360,619
% of Partners' Capital (Net Asset Value)			0.27%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Telecommunications [Member] | 4.15% Vodafone Group PLC Due 2014-06-10 [Member]
Schedule of Investments [Line Items]
Face Value			2,100,000
Fair Value			2,138,585
% of Partners' Capital (Net Asset Value)			0.24%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Automotive [Member] | 0.68% Volkswagen International Finance N.V.Due 2016-11-18 [Member]
Schedule of Investments [Line Items]
Face Value	10,000,000		10,000,000
Fair Value	10,029,887		10,017,381
% of Partners' Capital (Net Asset Value)	1.29%	[1]	1.14%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Automotive [Member] | 1.00% Volkswagen Int’l Finance N.V.Due 2014-03-21 [Member]
Schedule of Investments [Line Items]
Face Value			3,000,000
Fair Value			3,004,676
% of Partners' Capital (Net Asset Value)			0.34%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Mining [Member] | 8.95% Rio Tinto Finance (USA) Limited Due 2014-05-01 [Member]
Schedule of Investments [Line Items]
Face Value	1,140,000
Fair Value	1,190,147
% of Partners' Capital (Net Asset Value)	0.15%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Transportation [Member] | 0.94% Kansas City Southern de Mexico, SA de CV Due 2016-10-28 [Member]
Schedule of Investments [Line Items]
Face Value	4,000,000		4,000,000
Fair Value	4,034,147		4,066,942
% of Partners' Capital (Net Asset Value)	0.52%	[1]	0.46%	[1]
Corporate Notes [Member] | Foreign Corporate Notes [Member] | Multi-national [Member] | 0.38% International Finance Corporation Due 2015-02-26 [Member]
Schedule of Investments [Line Items]
Face Value			4,000,000
Fair Value			4,004,804
% of Partners' Capital (Net Asset Value)			0.45%	[1]
Total Securities [Member]
Schedule of Investments [Line Items]
Fair Value	452,420,254		530,922,246
% of Partners' Capital (Net Asset Value)	57.89%	[1]	60.30%	[1]
Investment Owned, at Cost	$ 453,548,618		$ 533,207,354

[1] Represents the annualized yield at date of purchase for discount securities, the stated coupon rate for coupon-bearing securities, or the stated interest rate for certificates of deposit.