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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements [Abstract]

The assets accounted for at fair value on a recurring basis

		Fair Value Measurements As of December 31, 2012
		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	347,392			$	—			$	—			$	347,392
Restricted cash and cash equivalents			33,009				—				—				33,009
Trading portfolio:
Debt securities:
US government obligations and agencies			—				4,009				—				4,009
Equity securities:
Common stock:
Metals and mining			26,130				—				—				26,130
Energy			10,868				—				—				10,868
Other			8,215				—				—				8,215
Exchange traded and mutual funds:
Metals and mining			21,989				—				—				21,989
Agriculture			10,265				—				—				10,265
Energy			5,068				—				—				5,068
Indices			2,506				—				—				2,506
Non-hedging derivative liability, net(2)			—				(21	)			—				(21	)
Other investments			317				—				—				317
Total trading portfolio investments		$	85,358			$	3,988			$	—			$	89,346
Total investments		$	465,759			$	3,988			$	—			$	469,747

		Fair Value Measurements As of December 31, 2011
		Level 1				Level 2				Level 3				Total
Cash and cash equivalents		$	229,685			$	—			$	—			$	229,685
Restricted cash and cash equivalents			78,312				—				—				78,312
Trading portfolio:
Debt securities:
US government obligations and agencies			174				3,627				—				3,801
Equity securities:
Common stock:
Metals and mining			38,816				—				—				38,816
Energy			4,999				—				—				4,999
Other			6,927				18				—				6,945
Exchange traded and mutual funds:
Metals and mining			25,997				—				—				25,997
Agriculture			16,878				—				—				16,878
Indices			1,710				—				—				1,710
Non-hedging derivative asset							123				—				123
Other investments			371				—				—				371
Total trading portfolio investments		$	95,872			$	3,768			$	—			$	99,640
Total investments		$	403,869			$	3,768			$	—			$	407,637

Summarizes the carrying value and estimated fair values of the financial instruments not carried at fair value

		As of December 31, 2012
		Carrying value				(Level 3) Estimated Fair Value
Liabilities:
Long-term debt		$	20,221			$	18,057

		As of December 31, 2011
		Carrying value				(Level 3) Estimated Fair Value
Liabilities:
Long-term debt		$	21,691			$	18,775

X

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 6

-Footnote 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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- Definition

Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements.

+ References

No definition available.

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