XML 42 R59.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | ---
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | $ 516,426 | $ 407,637
Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 85,827 | 99,640
Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 356,325 | 229,685
Restricted Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 74,274 | 78,312
U.S. Government Securities Obligations and Agencies [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 3,913 | 3,801
Equity Securities Common Stock Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 23,546 | 38,816
Equity Securities Common Stock Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 8,962 | 4,999
Equity Securities Common Stock Other [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 2,517 | 6,945
Equity Securities Exchange Traded and Mutual Funds Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 22,437 | 25,997
Equity Securities Exchange Traded and Mutual Funds Agriculture [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 18,172 | 16,878
Equity Securities Exchange Traded and Mutual Funds Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 4,090 |
Equity Securities Exchange Traded and Mutual Funds Indices [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 1,989 | 1,710
Non-hedging derivative (liability) [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | (174) |
Non-hedging derivative asset [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 31 | 123
Other Investments [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 344 | 371
Level One [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 512,656 | 403,869
Level One [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 82,057 | 95,872
Level One [Member] | Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 356,325 | 229,685
Level One [Member] | Restricted Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 74,274 | 78,312
Level One [Member] | U.S. Government Securities Obligations and Agencies [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  | 174
Level One [Member] | Equity Securities Common Stock Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 23,546 | 38,816
Level One [Member] | Equity Securities Common Stock Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 8,962 | 4,999
Level One [Member] | Equity Securities Common Stock Other [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 2,517 | 6,927
Level One [Member] | Equity Securities Exchange Traded and Mutual Funds Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 22,437 | 25,997
Level One [Member] | Equity Securities Exchange Traded and Mutual Funds Agriculture [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 18,172 | 16,878
Level One [Member] | Equity Securities Exchange Traded and Mutual Funds Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 4,090 |
Level One [Member] | Equity Securities Exchange Traded and Mutual Funds Indices [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 1,989 | 1,710
Level One [Member] | Non-hedging derivative (liability) [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level One [Member] | Non-hedging derivative asset [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level One [Member] | Other Investments [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 344 | 371
Level Two [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 3,770 | 3,768
Level Two [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 3,770 | 3,768
Level Two [Member] | Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Restricted Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | U.S. Government Securities Obligations and Agencies [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 3,913 | 3,627
Level Two [Member] | Equity Securities Common Stock Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Equity Securities Common Stock Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Equity Securities Common Stock Other [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  | 18
Level Two [Member] | Equity Securities Exchange Traded and Mutual Funds Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Equity Securities Exchange Traded and Mutual Funds Agriculture [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Equity Securities Exchange Traded and Mutual Funds Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Equity Securities Exchange Traded and Mutual Funds Indices [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Two [Member] | Non-hedging derivative (liability) [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | (174) |
Level Two [Member] | Non-hedging derivative asset [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value | 31 | 123
Level Two [Member] | Other Investments [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Restricted Cash and Cash Equivalents [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | U.S. Government Securities Obligations and Agencies [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Common Stock Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Common Stock Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Common Stock Other [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Exchange Traded and Mutual Funds Metals and Mining [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Exchange Traded and Mutual Funds Agriculture [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Exchange Traded and Mutual Funds Energy [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Equity Securities Exchange Traded and Mutual Funds Indices [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Non-hedging derivative (liability) [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Non-hedging derivative asset [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |
Level Three [Member] | Other Investments [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member] |  |
The assets accounted for at fair value on a recurring basis |  |
Investment Owned, at Fair Value |  |

X
- Details
Name: | us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph 2, 3 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Paragraph Column C -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C.Column C.7) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611225-123010 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Paragraph Column E -Article 12 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.Column E.2,3) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611322-123010 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Paragraph 7 -Article 12 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12.Column C.3,4) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611133-123010 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 13 -Paragraph 6 -Article 12 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 13 -Paragraph Column C -Article 12 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph Column C -Article 12 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13.Column C.6) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611282-123010 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph 3, 4 -Article 12 + Details
Name: | us-gaap_InvestmentOwnedAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant