Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of the Goodwill by Segment and the Changes in the Carrying Amount of Goodwill

The goodwill previously allocated to the TI segment was reassigned to the BT and M&S segments based on the relative fair value of the elements transferred from TI to each of BT and M&S.

	BT		TI			M&S		Events		Total
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
Translation adjustments		577		—			442		28		1,047
Balance, December 31, 2013	$	44,068	$	—		$	33,804	$	2,129	$	80,001

Summary of Intangible Assets

A summary of Forrester’s intangible assets is as follows (in thousands):

	December 31, 2013
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortizable intangible assets:
Customer relationships	$	33,927	$	28,552	$	5,375
Research content		4,699		4,699		—
Technology		1,507		1,105		402
Trademarks		73		73		—
Total	$	40,206	$	34,429	$	5,777
	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

Estimated Amortization Expense Related to Intangible Assets

Estimated amortization expense related to intangible assets that will continue to be amortized is as follows (in thousands):

Year ending December 31, 2014	$	2,150
Year ending December 31, 2015		1,019
Year ending December 31, 2016		923
Year ending December 31, 2017		874
Year ending December 31, 2018		811
Total	$	5,777