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Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill and Other Intangible Assets [Abstract]

Summary of the goodwill by segment and the changes in the carrying amount of goodwill

		BT				TI				M&S				Events				Total
Balance, December 31, 2010		$	22,208			$	24,653			$	19,191			$	1,906			$	67,958
Acquisition			—				3,695				—				—				3,695
Translation adjustments			(36	)			(40	)			(31	)			(3	)			(110	)
Balance, December 31, 2011			22,172				28,308				19,160				1,903				71,543
Reassignment			17,237				(28,308	)			11,071				—				—
Translation adjustments			4,082				—				3,131				198				7,411
Balance, December 31, 2012		$	43,491			$	—			$	33,362			$	2,101			$	78,954

Summary of intangible assets

		December 31, 2012
		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount
Amortizable intangible assets:
Customer relationships		$	33,759			$	26,644			$	7,115
Research content			7,043				7,043				—
Technology			1,507				702				805
Trademarks			876				876				—
Total		$	43,185			$	35,265			$	7,920
		December 31, 2011
		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount
Amortizable intangible assets:
Customer relationships		$	33,379			$	24,925			$	8,454
Research content			6,929				6,209				720
Technology			1,507				442				1,065
Trademarks			876				876				—
Other			328				250				78
Total		$	43,019			$	32,702			$	10,317

Estimated amortization expense related to intangible assets

Year ending December 31, 2013		$	2,228
Year ending December 31, 2014			2,133
Year ending December 31, 2015			1,002
Year ending December 31, 2016			906
Year ending December 31, 2017			857
Thereafter			794
Total		$	7,920

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Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

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- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 142

-Paragraph 47

-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 350

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-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.

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Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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