Forrester Research (FORR) 10-Q 6 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 01, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'FORR	'
Entity Registrant Name	'FORRESTER RESEARCH, INC.	'
Entity Central Index Key	'0001023313	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	18,244,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$52,634	$74,132
Marketable investments (Note 3)	81,024	81,013
Accounts receivable, net	41,182	77,543
Deferred commissions	11,278	12,939
Prepaid expenses and other current assets	22,481	20,762
Total current assets	208,599	266,389
Property and equipment, net	35,789	39,868
Goodwill	79,780	80,001
Intangible assets, net	4,686	5,777
Other assets	10,021	10,167
Total assets	338,875	402,202
Current Liabilities:	'	'
Accounts payable	966	1,024
Accrued expenses and other current liabilities	30,586	33,471
Deferred revenue	143,938	152,903
Total current liabilities	175,490	187,398
Non-current liabilities	9,464	10,142
Total liabilities	184,954	197,540
Commitments	'	'
Stockholders' Equity (Note 7):	'	'
Preferred stock, $.01 par value Authorized - 500 shares, issued and outstanding - none	0	0
Common stock, $.01 par value Authorized - 125,000 shares Issued - 20,690 and 20,491 as of June 30, 2014 and December 31, 2013, respectively Outstanding - 18,458 and 19,756 as of June 30, 2014 and December 31, 2013, respectively	207	205
Additional paid-in capital	115,803	109,676
Retained earnings	116,510	118,415
Treasury stock - 2,232 and 735 as of June 30, 2014 and December 31, 2013, respectively, at cost	-81,028	-26,088
Accumulated other comprehensive income	2,429	2,454
Total stockholders' equity	153,921	204,662
Total liabilities and stockholders' equity	$338,875	$402,202

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	500	500
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	125,000	125,000
Common stock, shares issued	20,690	20,491
Common stock, shares outstanding	18,458	19,756
Treasury stock, shares	2,232	735

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:	'	'	'	'
Research services	$52,322	$51,312	$103,115	$101,590
Advisory services and events	30,625	27,641	52,903	48,724
Total revenues	82,947	78,953	156,018	150,314
Operating expenses:	'	'	'	'
Cost of services and fulfillment	33,558	30,786	63,038	57,813
Selling and marketing	28,630	26,789	58,513	53,846
General and administrative	9,815	8,420	19,342	17,907
Depreciation	2,289	2,302	5,062	4,662
Amortization of intangible assets	536	554	1,075	1,113
Reorganization costs	1,039	314	1,888	1,905
Total operating expenses	75,867	69,165	148,918	137,246
Income from operations	7,080	9,788	7,100	13,068
Other income, net	79	255	15	631
Gains (losses) on investments, net	43	98	80	-102
Income before income taxes	7,202	10,141	7,195	13,597
Income tax provision	2,913	3,956	2,972	5,243
Net income	$4,289	$6,185	$4,223	$8,354
Basic income per common share	$0.23	$0.29	$0.22	$0.38
Diluted income per common share	$0.23	$0.28	$0.22	$0.38
Basic weighted average common shares outstanding	18,757	21,256	19,184	21,781
Diluted weighted average common shares outstanding	19,044	21,747	19,479	22,202
Cash dividends declared per common share	$0.16	$0.15	$0.32	$0.30

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]	'	'	'	'
Net income	$4,289	$6,185	$4,223	$8,354
Other comprehensive income (loss), net of taxes:	'	'	'	'
Foreign currency translation	-106	16	-61	-1,339
Net change in market value of investments	25	-370	36	-416
Other comprehensive loss	-81	-354	-25	-1,755
Comprehensive income	$4,208	$5,831	$4,198	$6,599

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$4,223	$8,354
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation	5,062	4,662
Amortization of intangible assets	1,075	1,113
Net (gains) losses from investments	-80	102
Deferred income taxes	-2,964	-5,376
Stock-based compensation	3,165	2,728
Amortization of premium on investments	751	1,265
Foreign currency (gains) losses	319	-34
Changes in assets and liabilities, net of acquisitions	'	'
Accounts receivable	36,210	34,564
Deferred commissions	1,661	560
Prepaid expenses and other current assets	-797	4,879
Accounts payable	-75	343
Accrued expenses and other liabilities	-4,159	-2,323
Deferred revenue	-9,110	-13,606
Net cash provided by operating activities	35,281	37,231
Cash flows from investing activities:	'	'
Purchases of property and equipment	-871	-1,267
Purchases of marketable investments	-27,165	-39,636
Proceeds from sales and maturities of marketable investments	26,464	49,143
Other investing activity	1,437	248
Net cash provided by (used in) investing activities	-135	8,488
Cash flows from financing activities:	'	'
Dividends paid on common stock	-6,128	-6,414
Repurchases of common stock	-54,940	-92,083
Proceeds from issuance of common stock under employee equity incentive plans	4,186	10,513
Excess tax benefits from stock-based compensation	100	638
Payment of deferred acquisition consideration	0	-900
Net cash used in financing activities	-56,782	-88,246
Effect of exchange rate changes on cash and cash equivalents	138	-1,200
Net decrease in cash and cash equivalents	-21,498	-43,727
Cash and cash equivalents, beginning of period	74,132	98,810
Cash and cash equivalents, end of period	$52,634	$55,083

Interim_Consolidated_Financial

Interim Consolidated Financial Statements	6 Months Ended
	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Interim Consolidated Financial Statements	'
	Note 1 — Interim Consolidated Financial Statements
	Basis of Presentation
	The accompanying unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for reporting on Form 10-Q. Accordingly, certain information and footnote disclosures required for complete financial statements are not included herein. The year-end balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. It is recommended that these financial statements be read in conjunction with the consolidated financial statements and related notes that appear in the Forrester Research, Inc. (“Forrester”) Annual Report on Form 10-K for the year ended December 31, 2013. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the financial position, results of operations, and cash flows as of the dates and for the periods presented have been included. The results of operations for the three and six months ended June 30, 2014 may not be indicative of the results for the year ending December 31, 2014, or any other period.
	During the quarter ended March 31, 2014, the Company recorded $0.5 million of expenses for out-of-period corrections, of which $0.4 million related to depreciation and $0.1 million related to other immaterial amounts that related to prior periods. The Company has concluded that these errors are immaterial to all prior period financial statements.
	Fair Value Measurements
	The carrying amounts reflected in the Consolidated Balance Sheets for cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses approximate fair value due to their short-term maturities. See Note 3 – Marketable Investments for the fair value of the Company’s marketable investments.
	Revision of quarterly financial statements
	During the quarter ended September 30, 2013, the Company identified certain immaterial prior period errors that affected the three and six months ended June 30, 2013. The Company has reflected in the financial information included in this Note the correction of these prior period errors in the three and six months ended June 30, 2013. The prior period errors relate to:
		•		An adjustment of $0.8 million for the three months ended June 30, 2013 to increase the amount of research services revenue related to recognition of revenue for the event ticket included in the Company’s RoleView and Forrester Leadership Board subscription products. The effect of this error has also been reflected in deferred revenue in the revised consolidated statement of cash flows presented below.
		•		Adjustments to revenue for historical insignificant variances in deferred revenue for reconciling items between the Company’s general ledger and sub-ledger system. The decrease to revenue for the three months ended March 31, 2013 was ($0.1) million and the effect of this error has also been reflected in deferred revenue in the revised consolidated statement of cash flows presented below.
		•		Adjustments to the Company’s share of operating results in one of the technology-related investment funds in which the Company holds an interest, which adjustments are principally a result of information received by the Company from the fund after the applicable reporting periods. The Company records a portion of the fund’s operating results, based on the Company’s ownership interest in the fund, as investment gains (losses). The adjustments to the gains (losses) on investments for the three months ended March 31, 2013 and June 30, 2013 was ($0.1) million and $0.1 million, respectively.
	Revised Consolidated Statements of Income
			Three Months Ended June 30, 2013									Six Months Ended June 30, 2013
			As			Adjustments			As			As			Adjustments			As
			Previously						Revised			Previously						Revised
			Reported									Reported
	Revenues:
	Research services		$	50,512		$	800		$	51,312		$	100,890		$	700		$	101,590
	Advisory services and events			27,652			(11	)		27,641			48,773			(49	)		48,724
	Total revenues			78,164			789			78,953			149,663			651			150,314
	Income from operations			8,999			789			9,788			12,417			651			13,068
	Gains (losses) on investments, net			(51	)		149			98			(102	)		—			(102	)
	Income before income taxes			9,203			938			10,141			12,946			651			13,597
	Income tax provision			3,581			375			3,956			4,983			260			5,243
	Net income		$	5,622		$	563		$	6,185		$	7,963		$	391		$	8,354
	Basic income per common share		$	0.26		$	0.03		$	0.29		$	0.37		$	0.01		$	0.38
	Diluted income per common share		$	0.26		$	0.02		$	0.28		$	0.36		$	0.02		$	0.38
	Revised Consolidated Statements of Comprehensive Income
	The consolidated statement of comprehensive income for the three and six months ended June 30, 2013 is impacted by the same amount as net income for the period.
	Revised Consolidated Statements of Cash Flows
			Six Months Ended June 30, 2013
			As			Adjustments			As
			Previously						Revised
			Reported
	Cash flows from operating activities:
	Net income		$	7,963		$	391		$	8,354
	Prepaid expenses and other current assets			4,619			260			4,879
	Deferred revenue			(12,955	)		(651	)		(13,606	)
	Net cash provided by operating activities			37,231			—			37,231

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Income	'
	Note 2 — Accumulated Other Comprehensive Income
	The components of accumulated other comprehensive income are as follows (in thousands):
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2014	$	16		$	2,438		$	2,454
	Foreign currency translation		—			(61	)		(61	)
	Unrealized gain on investments before reclassification, net of tax of $27		33			—			33
	Reclassification adjustment for net loss realized in net income, net of tax of $2		3			—			3
	Balance at June 30, 2014	$	52		$	2,377		$	2,429
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at April 1, 2014	$	27		$	2,483		$	2,510
	Foreign currency translation		—			(106	)		(106	)
	Unrealized gain on investments before reclassification, net of tax of $27		27			—			27
	Reclassification adjustment for net gain realized in net income, net of tax of $2		(2	)		—			(2	)
	Balance at June 30, 2014	$	52		$	2,377		$	2,429
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2013	$	(1,024	)	$	1,612		$	588
	Foreign currency translation		—			(1,339	)		(1,339	)
	Unrealized loss on investments before reclassification, net of tax of $241		(440	)		—			(440	)
	Reclassification adjustments for net gains realized in net income, net of tax of $15		24			—			24
	Balance at June 30, 2013	$	(1,440	)	$	273		$	(1,167	)
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at April 1, 2013	$	(1,070	)	$	257		$	(813	)
	Foreign currency translation		—			16			16
	Unrealized loss on investments before reclassification, net of tax of $238		(394	)		—			(394	)
	Reclassification adjustments for net gains realized in net income, net of tax of $15		24			—			24
	Balance at June 30, 2013	$	(1,440	)	$	273		$	(1,167	)
	Reclassification adjustments for net gains (losses) are reported in gains (losses) on investments, net in the Consolidated Statements of Income.

Marketable_Investments

Marketable Investments	6 Months Ended
	Jun. 30, 2014
Investments Debt And Equity Securities [Abstract]	'
Marketable Investments	'
	Note 3 — Marketable Investments
	The following table summarizes the Company’s marketable investments (in thousands):
			Amortized		Gross		Gross			Market
			Cost		Unrealized		Unrealized			Value
					Gains		Losses
	June 30, 2014
	Available-for-sale securities
	State and municipal obligations		$	4,203	$	3	$	—		$	4,206
	Federal agency and corporate obligations			76,735		116		(33	)		76,818
	Total		$	80,938	$	119	$	(33	)	$	81,024
			Amortized		Gross		Gross			Market
			Cost		Unrealized		Unrealized			Value
					Gains		Losses
	December 31, 2013
	Available-for-sale securities
	State and municipal obligations		$	6,809	$	5	$	—		$	6,814
	Federal agency and corporate obligations			74,179		112		(92	)		74,199
	Total		$	80,988	$	117	$	(92	)	$	81,013
	Realized gains and losses on securities are included in earnings and are determined using the specific identification method. Realized gains or losses on the sale of the Company’s federal agency, state, municipal and corporate obligations were not material in the three and six months ended June 30, 2014 or 2013.
	The following table summarizes the maturity periods of the marketable securities in the Company’s portfolio as of June 30, 2014 (in thousands).
			FY 2014		FY2015		FY2016			Thereafter		Total
	State and municipal obligations		$	2,201	$	2,005	$	—		$	—	$	4,206
	Federal agency and corporate obligations			6,878		42,026		18,272			9,642		76,818
	Total		$	9,079	$	44,031	$	18,272		$	9,642	$	81,024
	The following table shows the gross unrealized losses and market value of Forrester’s available-for-sale securities with unrealized losses that are not deemed to be other-than-temporary, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):
			As of June 30, 2014
			Less Than 12 Months				12 Months or Greater
			Market		Unrealized		Market			Unrealized
			Value		Losses		Value			Losses
	State and municipal bonds		$	—	$	—	$	—		$	—
	Federal agency and corporate obligations			15,426		33		—			—
	Total		$	15,426	$	33	$	—		$	—
			As of December 31, 2013
			Less Than 12 Months				12 Months or Greater
			Market		Unrealized		Market			Unrealized
			Value		Losses		Value			Losses
	State and municipal bonds		$	—	$	—	$	—		$	—
	Federal agency and corporate obligations			30,645		92		—			—
	Total		$	30,645	$	92	$	—		$	—
	Fair Value
	The Company measures certain financial assets at fair value on a recurring basis, including cash equivalents, available-for-sale securities and trading securities. The fair values of these financial assets have been classified as Level 1, 2 or 3 within the fair value hierarchy as described in the accounting standards for fair value measurements.
	Level 1 — Fair value based on quoted prices in active markets for identical assets or liabilities.
	Level 2 — Fair value based on inputs other than Level 1 inputs that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 — Fair value based on unobservable inputs that are supported by little or no market activity and such inputs are significant to the fair value of the assets or liabilities.
	The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013 (in thousands):
			As of June 30, 2014
			Level 1		Level 2		Level 3			Total
	Money market funds (1)		$	1,733	$	—	$	—		$	1,733
	State and municipal obligations			—		4,206		—			4,206
	Federal agency and corporate obligations			—		76,818		—			76,818
	Total		$	1,733	$	81,024	$	—		$	82,757
			As of December 31, 2013
			Level 1		Level 2		Level 3			Total
	Money market funds (1)		$	6,897	$	—	$	—		$	6,897
	State and municipal obligations			—		6,814		—			6,814
	Federal agency and corporate obligations (2)			—		80,449		—			80,449
	Total		$	6,897	$	87,263	$	—		$	94,160
	-1	Included in cash and cash equivalents.
	-2	$6.2 million are included in cash and cash equivalents at December 31, 2013 as original maturities at the time of purchase were 90 days or less.
	Level 2 assets consist of the Company’s entire portfolio of federal, state, municipal and corporate bonds. Level 2 assets have been initially valued at the transaction price and subsequently valued, at the end of each reporting period, typically utilizing third party pricing services or other market observable data. The pricing services utilize industry standard valuation methods, including both income and market based approaches and observable market inputs to determine value. These observable market inputs include reportable trades, benchmark yields, credit spreads, broker/dealer quotes, bids, offers, current spot rates and other industry and economic events.

NonMarketable_Investments

Non-Marketable Investments	6 Months Ended
	Jun. 30, 2014
Investments Debt And Equity Securities [Abstract]	'
Non-Marketable Investments	'
	Note 4 — Non-Marketable Investments
	At June 30, 2014 and December 31, 2013, the carrying value of the Company’s non-marketable investments, which were composed primarily of interests in technology-related private equity funds, was $4.3 million and $5.7 million, respectively, and is included in other assets in the Consolidated Balance Sheets.
	One of the Company’s investments, with a book value of $0.9 million at June 30, 2014 and December 31, 2013, is being accounted for using the cost method and, accordingly, is valued at cost unless an other-than-temporary impairment in its value occurs. The other investments are being accounted for using the equity method as the investments are limited partnerships and the Company has an ownership interest in excess of 5% and, accordingly, the Company records its share of the investee’s operating results each period. The Company recorded a gain (loss) from its non-marketable investments of $0.1 million during the three months ended June 30, 2013 and $0.1 million and $(0.1) million during the six months ended June 30, 2014 and 2013, respectively, which is included in gains (losses) on investments, net in the Consolidated Statements of Income. Gains from investments were insignificant during the three months ended June 30, 2014. During the six months ended June 30, 2014 and 2013, gross distributions of $1.4 million and $0.2 million, respectively, were received from the funds.

Reorganization

Reorganization	6 Months Ended
	Jun. 30, 2014
Restructuring And Related Activities [Abstract]	'
Reorganization	'
	Note 5 — Reorganization
	In the first quarter of 2014 the Company terminated approximately 1% of its employees across various geographies and functions primarily to realign resources due to the Company’s new organizational structure put in place in late 2013. The Company incurred $0.8 million and $1.0 million of severance and related costs in the three months ended March 31, 2014 and June 30, 2014, respectively. The accrual at June 30, 2014 is expected to be paid by the end of 2014.
	During 2013 the Company incurred $1.9 million of severance and related costs for the elimination of 31 jobs or approximately 2.5% of its workforce worldwide to streamline its operations. Approximately $1.6 million of the costs were recognized in the three months ended March 31, 2013 and approximately $0.3 million were recognized in the three months ended June 30, 2013.
	The following table rolls forward the activity in the reorganization accrual for the six months ended June 30, 2014 (in thousands):
		Workforce
		Reduction
	Accrual at December 31, 2013	$	121
	Additions		1,888
	Cash payments		(875	)
	Accrual at June 30, 2014	$	1,134

Net_Income_Per_Common_Share

Net Income Per Common Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Net Income Per Common Share	'
	Note 6 — Net Income Per Common Share
	Basic net income per common share is computed by dividing net income by the basic weighted average number of common shares outstanding during the period. Diluted net income per common share is computed by dividing net income by the diluted weighted average number of common shares and common equivalent shares outstanding during the period. The weighted average number of common equivalent shares outstanding has been determined in accordance with the treasury-stock method. Common equivalent shares consist of common stock issuable on the exercise of outstanding options and vesting of restricted stock units when dilutive.
	Basic and diluted weighted average common shares are as follows (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Basic weighted average common shares outstanding		18,757		21,256		19,184		21,781
	Weighted average common equivalent shares		287		491		295		421
	Diluted weighted average common shares outstanding		19,044		21,747		19,479		22,202
	Options excluded from diluted weighted average share calculation as effect would have been anti-dilutive		602		295		582		746

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Stockholders' Equity	'
	Note 7 — Stockholders’ Equity
	Equity Plans
	Stock option activity for the six months ended June 30, 2014 is presented below (in thousands, except per share data):
		Number			Weighted-			Weighted-			Aggregate
		of Shares			Average			Average			Intrinsic
					Exercise			Remaining			Value
					Price Per			Contractual
					Share			Term (in years)
	Outstanding at December 31, 2013		1,734		$	31.85
	Granted		111			36.8
	Exercised		(110	)		31.37
	Forfeited		(57	)		34.57
	Outstanding at June 30, 2014		1,678		$	32.11			6.69		$	9,710
	Exercisable at June 30, 2014		943		$	29.96			5.2		$	7,493
	Restricted stock unit activity for the six months ended June 30, 2014 is presented below (in thousands, except per share data):
		Number of			Weighted-
		Shares			Average
					Grant Date
					Fair Value
	Unvested at December 31, 2013		372		$	34.14
	Granted		—
	Vested or settled		(96	)		33.99
	Forfeited		(68	)		33.41
	Unvested at June 30, 2014		208		$	34.45
	Stock-Based Compensation
	Forrester recognizes the fair value of stock-based compensation in net income over the requisite service period of the individual grantee, which generally equals the vesting period. Stock-based compensation was recorded in the following expense categories (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Cost of services and fulfillment	$	798		$	743		$	1,871		$	1,647
	Selling and marketing		127			150			465			572
	General and administrative		293			(25	)		829			509
	Total	$	1,218		$	868		$	3,165		$	2,728
	Forrester utilizes the Black-Scholes valuation model for estimating the fair value of stock options. Options granted under the equity incentive plans and shares subject to purchase under the employee stock purchase plan were valued using the following assumptions:
		Three Months Ended						Three Months Ended
		June 30, 2014						June 30, 2013
		Equity Incentive			Employee Stock			Equity Incentive			Employee Stock
		Plans			Purchase Plan			Plans			Purchase Plan
	Average risk-free interest rate		1.7	%		0.08	%		0.71	%		0.11	%
	Expected dividend yield		1.8	%		1.8	%		2.1	%		2.1	%
	Expected life		5.1 Years			0.5 Years			4.9 Years			0.5 Years
	Expected volatility		30	%		25	%		36	%		25	%
	Weighted average fair value	$	8.67		$	7.81		$	9.27		$	5.97
		Six Months Ended						Six Months Ended
		June 30, 2014						June 30, 2013
		Equity Incentive			Employee Stock			Equity Incentive			Employee Stock
		Plans			Purchase Plan			Plans			Purchase Plan
	Average risk-free interest rate		1.66	%		0.08	%		0.72	%		0.11	%
	Expected dividend yield		1.8	%		1.8	%		2.1	%		2.1	%
	Expected life		5.1 Years			0.5 Years			4.8 Years			0.5 Years
	Expected volatility		30	%		25	%		37	%		25	%
	Weighted average fair value	$	8.76		$	7.81		$	9.05		$	5.97
	Dividends
	In the six months ended June 30, 2014, the Company declared and paid dividends of $6.1 million consisting of a $0.16 per share dividend in each of the first two quarters of 2014. In the six months ended June 30, 2013, the Company declared and paid dividends of $6.4 million consisting of a $0.15 per share dividend in each of the first two quarters of 2013. In July 2014, the Company declared a dividend of $0.16 per share payable on September 17, 2014 to shareholders of record as of September 3, 2014.
	Treasury Stock
	Forrester’s Board of Directors has authorized an aggregate $410.0 million to purchase common stock under its stock repurchase program, including $25.0 million authorized in April 2014. The shares repurchased may be used, among other things, in connection with Forrester’s employee and director equity incentive and purchase plans. In the six months ended June 30, 2014, the Company repurchased approximately 1.5 million shares of common stock at an aggregate cost of approximately $54.9 million. From the inception of the program through June 30, 2014, Forrester repurchased approximately 13.9 million shares of common stock at an aggregate cost of approximately $384.0 million.

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 8 — Income Taxes
	Forrester provides for income taxes on an interim basis according to management’s estimate of the effective tax rate expected to be applicable for the full fiscal year. Certain items such as changes in tax rates and tax benefits related to disqualifying dispositions of incentive stock options are treated as discrete items and are recorded in the period in which they arise.
	Income tax expense for the six months ended June 30, 2014 was $3.0 million resulting in an effective tax rate of 41.3% for the period. Income tax expense for the six months ended June 30, 2013 was $5.2 million resulting in an effective tax rate of 38.6% for the period. The increase in the effective tax rate during the six months ended June 30, 2014 as compared to the prior year was primarily due to the recognition of $0.2 million in the six months ended June 30, 2014 for potential additional tax expense resulting from an on-going U.S state audit.

Operating_Segments

Operating Segments	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Operating Segments	'
	Note 9 — Operating Segments
	At the end of 2013 the Company reorganized its fulfillment organization into a single global research organization and a single global product organization to better support its client base by facilitating better research collaboration and quality, promoting a more uniform client experience and improved customer satisfaction, and encouraging innovation. During 2013 the Company also established a dedicated consulting organization to provide research-based project consulting services to its clients, allowing the Company’s research personnel to spend additional time on writing research and providing shorter-term advisory services. As of January 1, 2014 the Company conformed its internal reporting to match the new organizational structure and as such is reporting segment information for the newly formed Research, Product and Project Consulting organizations. The 2013 segment amounts have been reclassified to conform to the current presentation.
	The Research segment includes the costs of the Company’s research personnel who are responsible for writing the research and performing the webinars and inquiries for the Company’s RoleView product. In addition, the research personnel deliver advisory services (such as workshops, speeches and advisory days) and a portion of the Company’s project consulting services. Revenue in this segment includes only revenue from advisory services and project consulting services that are delivered by the research personnel in this segment. During 2013, the Company began to transition the delivery of project consulting to a dedicated project consulting organization. The Company anticipates that the transition will be complete by the end of 2014 such that essentially all project consulting will be delivered by the project consulting organization in 2015.
	The Product segment includes the costs of the product management organization that is responsible for pricing, packaging and the launch of new products. In addition, this segment includes the costs of the Company’s data, Forrester Leadership Boards and events organizations. Revenue in this segment includes all revenue for the Company (including RoleView) except for revenue from advisory services and project consulting services that are delivered by personnel in the Research and Project Consulting segments.
	The Project Consulting segment includes the costs of the consultants that deliver the Company’s project consulting services. During 2013 the Company began to hire dedicated consultants to transition the delivery of project consulting services from research personnel (included in the Research segment) to the new Project Consulting segment. Revenue in this segment includes the project consulting revenue delivered by the consultants in this segment.
	The Company evaluates reportable segment performance and allocates resources based on segment revenues and expenses. Segment expenses include the direct expenses of each segment organization and exclude selling and marketing expenses, general and administrative expenses, stock-based compensation expense, depreciation expense, adjustments to incentive bonus compensation from target amounts, amortization of intangible assets, reorganization costs, other income and gains/losses on investments. The accounting policies used by the segments are the same as those used in the consolidated financial statements.
		Products		Research			Project			Consolidated
							Consulting
	Three Months Ended June 30, 2014
	Research services revenues	$	52,322	$	—		$	—		$	52,322
	Advisory services and events revenues		9,994		12,672			7,959			30,625
	Total segment revenues		62,316		12,672			7,959			82,947
	Segment expenses		11,894		13,399			6,438			31,731
	Contribution margin (loss)		50,422		(727	)		1,521			51,216
	Selling, marketing, administrative and other expenses										(42,561	)
	Amortization of intangible assets										(536	)
	Reorganization costs										(1,039	)
	Other income and gains/losses on investments										122
	Income before income taxes									$	7,202
		Products		Research			Project			Consolidated
							Consulting
	Three Months Ended June 30, 2013
	Research services revenues	$	51,312	$	—		$	—		$	51,312
	Advisory services and events revenues		9,482		14,812			3,347			27,641
	Total segment revenues		60,794		14,812			3,347			78,953
	Segment expenses		10,924		14,704			3,624			29,252
	Contribution margin (loss)		49,870		108			(277	)		49,701
	Selling, marketing, administrative and other expenses										(39,045	)
	Amortization of intangible assets										(554	)
	Reorganization costs										(314	)
	Other income and gains/losses on investments										353
	Income before income taxes									$	10,141
		Products		Research			Project			Consolidated
							Consulting
	Six Months Ended June 30, 2014
	Research services revenues	$	103,115	$	—		$	—		$	103,115
	Advisory services and events revenues		12,851		26,648			13,404			52,903
	Total segment revenues		115,966		26,648			13,404			156,018
	Segment expenses		20,245		27,374			12,115			59,734
	Contribution margin (loss)		95,721		(726	)		1,289			96,284
	Selling, marketing, administrative and other expenses										(86,221	)
	Amortization of intangible assets										(1,075	)
	Reorganization costs										(1,888	)
	Other income and gains/losses on investments										95
	Income before income taxes									$	7,195
		Products		Research			Project			Consolidated
							Consulting
	Six Months Ended June 30, 2013
	Research services revenues	$	101,590	$	—		$	—		$	101,590
	Advisory services and events revenues		11,701		29,750			7,273			48,724
	Total segment revenues		113,291		29,750			7,273			150,314
	Segment expenses		18,494		28,586			6,973			54,053
	Contribution margin (loss)		94,797		1,164			300			96,261
	Selling, marketing, administrative and other expenses										(80,175	)
	Amortization of intangible assets										(1,113	)
	Reorganization costs										(1,905	)
	Other income and gains/losses on investments										529
	Income before income taxes									$	13,597

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2014
Accounting Changes And Error Corrections [Abstract]	'
Recent Accounting Pronouncements	'
	Note 10 — Recent Accounting Pronouncements
	In May, 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The new standard will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. For Forrester, the standard will be effective in the first quarter of 2017. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. The Company has not yet selected a transition method. The Company is currently evaluating the potential changes from this ASU to its future financial reporting and disclosures.
	In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The standard addresses the balance sheet presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The standard requires that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this ASU as of January 1, 2014 did not have a material effect on the Company’s balance sheet.

Interim_Consolidated_Financial1

Interim Consolidated Financial Statements (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Changes And Error Corrections [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited interim consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for reporting on Form 10-Q. Accordingly, certain information and footnote disclosures required for complete financial statements are not included herein. The year-end balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. It is recommended that these financial statements be read in conjunction with the consolidated financial statements and related notes that appear in the Forrester Research, Inc. (“Forrester”) Annual Report on Form 10-K for the year ended December 31, 2013. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the financial position, results of operations, and cash flows as of the dates and for the periods presented have been included. The results of operations for the three and six months ended June 30, 2014 may not be indicative of the results for the year ending December 31, 2014, or any other period.
	During the quarter ended March 31, 2014, the Company recorded $0.5 million of expenses for out-of-period corrections, of which $0.4 million related to depreciation and $0.1 million related to other immaterial amounts that related to prior periods.
Fair Value Measurements	'
	Fair Value Measurements
	The carrying amounts reflected in the Consolidated Balance Sheets for cash and cash equivalents, accounts receivable, accounts payable, and accrued expenses approximate fair value due to their short-term maturities. See Note 3 – Marketable Investments for the fair value of the Company’s marketable investments.
Revision of Quarterly Financial Statements	'
	Revision of quarterly financial statements
	During the quarter ended September 30, 2013, the Company identified certain immaterial prior period errors that affected the three and six months ended June 30, 2013. The Company has reflected in the financial information included in this Note the correction of these prior period errors in the three and six months ended June 30, 2013. The prior period errors relate to:
		•		An adjustment of $0.8 million for the three months ended June 30, 2013 to increase the amount of research services revenue related to recognition of revenue for the event ticket included in the Company’s RoleView and Forrester Leadership Board subscription products. The effect of this error has also been reflected in deferred revenue in the revised consolidated statement of cash flows presented below.
		•		Adjustments to revenue for historical insignificant variances in deferred revenue for reconciling items between the Company’s general ledger and sub-ledger system. The decrease to revenue for the three months ended March 31, 2013 was ($0.1) million and the effect of this error has also been reflected in deferred revenue in the revised consolidated statement of cash flows presented below.
		•		Adjustments to the Company’s share of operating results in one of the technology-related investment funds in which the Company holds an interest, which adjustments are principally a result of information received by the Company from the fund after the applicable reporting periods. The Company records a portion of the fund’s operating results, based on the Company’s ownership interest in the fund, as investment gains (losses). The adjustments to the gains (losses) on investments for the three months ended March 31, 2013 and June 30, 2013 was ($0.1) million and $0.1 million, respectively.
	Revised Consolidated Statements of Income
			Three Months Ended June 30, 2013									Six Months Ended June 30, 2013
			As			Adjustments			As			As			Adjustments			As
			Previously						Revised			Previously						Revised
			Reported									Reported
	Revenues:
	Research services		$	50,512		$	800		$	51,312		$	100,890		$	700		$	101,590
	Advisory services and events			27,652			(11	)		27,641			48,773			(49	)		48,724
	Total revenues			78,164			789			78,953			149,663			651			150,314
	Income from operations			8,999			789			9,788			12,417			651			13,068
	Gains (losses) on investments, net			(51	)		149			98			(102	)		—			(102	)
	Income before income taxes			9,203			938			10,141			12,946			651			13,597
	Income tax provision			3,581			375			3,956			4,983			260			5,243
	Net income		$	5,622		$	563		$	6,185		$	7,963		$	391		$	8,354
	Basic income per common share		$	0.26		$	0.03		$	0.29		$	0.37		$	0.01		$	0.38
	Diluted income per common share		$	0.26		$	0.02		$	0.28		$	0.36		$	0.02		$	0.38
	Revised Consolidated Statements of Comprehensive Income
	The consolidated statement of comprehensive income for the three and six months ended June 30, 2013 is impacted by the same amount as net income for the period.
	Revised Consolidated Statements of Cash Flows
			Six Months Ended June 30, 2013
			As			Adjustments			As
			Previously						Revised
			Reported
	Cash flows from operating activities:
	Net income		$	7,963		$	391		$	8,354
	Prepaid expenses and other current assets			4,619			260			4,879
	Deferred revenue			(12,955	)		(651	)		(13,606	)
	Net cash provided by operating activities			37,231			—			37,231
Revenue Recognition	'
	In May, 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The new standard will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. For Forrester, the standard will be effective in the first quarter of 2017. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. The Company has not yet selected a transition method. The Company is currently evaluating the potential changes from this ASU to its future financial reporting and disclosures.
Unrecognized Tax Benefit	'
	In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The standard addresses the balance sheet presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The standard requires that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this ASU as of January 1, 2014 did not have a material effect on the Company’s balance sheet.

Interim_Consolidated_Financial2

Interim Consolidated Financial Statements (Tables)	6 Months Ended
	Jun. 30, 2014
Statements of Income [Member]	'
Revised Consolidated Financial Statements	'
	Revised Consolidated Statements of Income
		Three Months Ended June 30, 2013									Six Months Ended June 30, 2013
		As			Adjustments			As			As			Adjustments			As
		Previously						Revised			Previously						Revised
		Reported									Reported
	Revenues:
	Research services	$	50,512		$	800		$	51,312		$	100,890		$	700		$	101,590
	Advisory services and events		27,652			(11	)		27,641			48,773			(49	)		48,724
	Total revenues		78,164			789			78,953			149,663			651			150,314
	Income from operations		8,999			789			9,788			12,417			651			13,068
	Gains (losses) on investments, net		(51	)		149			98			(102	)		—			(102	)
	Income before income taxes		9,203			938			10,141			12,946			651			13,597
	Income tax provision		3,581			375			3,956			4,983			260			5,243
	Net income	$	5,622		$	563		$	6,185		$	7,963		$	391		$	8,354
	Basic income per common share	$	0.26		$	0.03		$	0.29		$	0.37		$	0.01		$	0.38
	Diluted income per common share	$	0.26		$	0.02		$	0.28		$	0.36		$	0.02		$	0.38
Statements of Cash Flows [Member]	'
Revised Consolidated Financial Statements	'
	Revised Consolidated Statements of Cash Flows
		Six Months Ended June 30, 2013
		As			Adjustments			As
		Previously						Revised
		Reported
	Cash flows from operating activities:
	Net income	$	7,963		$	391		$	8,354
	Prepaid expenses and other current assets		4,619			260			4,879
	Deferred revenue		(12,955	)		(651	)		(13,606	)
	Net cash provided by operating activities		37,231			—			37,231

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Components of Accumulated Other Comprehensive Income	'
	The components of accumulated other comprehensive income are as follows (in thousands):
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2014	$	16		$	2,438		$	2,454
	Foreign currency translation		—			(61	)		(61	)
	Unrealized gain on investments before reclassification, net of tax of $27		33			—			33
	Reclassification adjustment for net loss realized in net income, net of tax of $2		3			—			3
	Balance at June 30, 2014	$	52		$	2,377		$	2,429
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at April 1, 2014	$	27		$	2,483		$	2,510
	Foreign currency translation		—			(106	)		(106	)
	Unrealized gain on investments before reclassification, net of tax of $27		27			—			27
	Reclassification adjustment for net gain realized in net income, net of tax of $2		(2	)		—			(2	)
	Balance at June 30, 2014	$	52		$	2,377		$	2,429
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at January 1, 2013	$	(1,024	)	$	1,612		$	588
	Foreign currency translation		—			(1,339	)		(1,339	)
	Unrealized loss on investments before reclassification, net of tax of $241		(440	)		—			(440	)
	Reclassification adjustments for net gains realized in net income, net of tax of $15		24			—			24
	Balance at June 30, 2013	$	(1,440	)	$	273		$	(1,167	)
		Net Unrealized Gain			Cumulative			Total
		(Loss) on Marketable			Translation			Accumulated
		Investments			Adjustment			Other Comprehensive
								Income (Loss)
	Balance at April 1, 2013	$	(1,070	)	$	257		$	(813	)
	Foreign currency translation		—			16			16
	Unrealized loss on investments before reclassification, net of tax of $238		(394	)		—			(394	)
	Reclassification adjustments for net gains realized in net income, net of tax of $15		24			—			24
	Balance at June 30, 2013	$	(1,440	)	$	273		$	(1,167	)

Marketable_Investments_Tables

Marketable Investments (Tables)	6 Months Ended
	Jun. 30, 2014
Investments Debt And Equity Securities [Abstract]	'
Summary of Company's Marketable Investments	'
	The following table summarizes the Company’s marketable investments (in thousands):
			Amortized		Gross		Gross			Market
			Cost		Unrealized		Unrealized			Value
					Gains		Losses
	June 30, 2014
	Available-for-sale securities
	State and municipal obligations		$	4,203	$	3	$	—		$	4,206
	Federal agency and corporate obligations			76,735		116		(33	)		76,818
	Total		$	80,938	$	119	$	(33	)	$	81,024
			Amortized		Gross		Gross			Market
			Cost		Unrealized		Unrealized			Value
					Gains		Losses
	December 31, 2013
	Available-for-sale securities
	State and municipal obligations		$	6,809	$	5	$	—		$	6,814
	Federal agency and corporate obligations			74,179		112		(92	)		74,199
	Total		$	80,988	$	117	$	(92	)	$	81,013
Summary of Maturity Periods of the Marketable Securities	'
	The following table summarizes the maturity periods of the marketable securities in the Company’s portfolio as of June 30, 2014 (in thousands).
			FY 2014		FY2015		FY2016			Thereafter		Total
	State and municipal obligations		$	2,201	$	2,005	$	—		$	—	$	4,206
	Federal agency and corporate obligations			6,878		42,026		18,272			9,642		76,818
	Total		$	9,079	$	44,031	$	18,272		$	9,642	$	81,024
Summary of Gross Unrealized Losses and Market Value of Available-for-Sale Securities with Unrealized Losses	'
	The following table shows the gross unrealized losses and market value of Forrester’s available-for-sale securities with unrealized losses that are not deemed to be other-than-temporary, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):
			As of June 30, 2014
			Less Than 12 Months				12 Months or Greater
			Market		Unrealized		Market			Unrealized
			Value		Losses		Value			Losses
	State and municipal bonds		$	—	$	—	$	—		$	—
	Federal agency and corporate obligations			15,426		33		—			—
	Total		$	15,426	$	33	$	—		$	—
			As of December 31, 2013
			Less Than 12 Months				12 Months or Greater
			Market		Unrealized		Market			Unrealized
			Value		Losses		Value			Losses
	State and municipal bonds		$	—	$	—	$	—		$	—
	Federal agency and corporate obligations			30,645		92		—			—
	Total		$	30,645	$	92	$	—		$	—
Summary of Company's Fair Value Hierarchy for its Financial Assets	'
	The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) measured at fair value on a recurring basis as of June 30, 2014 and December 31, 2013 (in thousands):
			As of June 30, 2014
			Level 1		Level 2		Level 3			Total
	Money market funds (1)		$	1,733	$	—	$	—		$	1,733
	State and municipal obligations			—		4,206		—			4,206
	Federal agency and corporate obligations			—		76,818		—			76,818
	Total		$	1,733	$	81,024	$	—		$	82,757
			As of December 31, 2013
			Level 1		Level 2		Level 3			Total
	Money market funds (1)		$	6,897	$	—	$	—		$	6,897
	State and municipal obligations			—		6,814		—			6,814
	Federal agency and corporate obligations (2)			—		80,449		—			80,449
	Total		$	6,897	$	87,263	$	—		$	94,160
	-1	Included in cash and cash equivalents.
	-2	$6.2 million are included in cash and cash equivalents at December 31, 2013 as original maturities at the time of purchase were 90 days or less.

Reorganization_Tables

Reorganization (Tables)	6 Months Ended
	Jun. 30, 2014
Restructuring And Related Activities [Abstract]	'
Summary of Rolls Forward of Activity in Reorganization Accrual	'
	The following table rolls forward the activity in the reorganization accrual for the six months ended June 30, 2014 (in thousands):
		Workforce
		Reduction
	Accrual at December 31, 2013	$	121
	Additions		1,888
	Cash payments		(875	)
	Accrual at June 30, 2014	$	1,134

Net_Income_Per_Common_Share_Ta

Net Income Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Summary of Basic and Diluted Weighted Average Common Shares	'
	Basic and diluted weighted average common shares are as follows (in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Basic weighted average common shares outstanding		18,757		21,256		19,184		21,781
	Weighted average common equivalent shares		287		491		295		421
	Diluted weighted average common shares outstanding		19,044		21,747		19,479		22,202
	Options excluded from diluted weighted average share calculation as effect would have been anti-dilutive		602		295		582		746

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Summary of Stock Option Activity	'
	Stock option activity for the six months ended June 30, 2014 is presented below (in thousands, except per share data):
		Number			Weighted-			Weighted-			Aggregate
		of Shares			Average			Average			Intrinsic
					Exercise			Remaining			Value
					Price Per			Contractual
					Share			Term (in years)
	Outstanding at December 31, 2013		1,734		$	31.85
	Granted		111			36.8
	Exercised		(110	)		31.37
	Forfeited		(57	)		34.57
	Outstanding at June 30, 2014		1,678		$	32.11			6.69		$	9,710
	Exercisable at June 30, 2014		943		$	29.96			5.2		$	7,493
Details of Restricted Stock Unit Activity	'
	Restricted stock unit activity for the six months ended June 30, 2014 is presented below (in thousands, except per share data):
		Number of			Weighted-
		Shares			Average
					Grant Date
					Fair Value
	Unvested at December 31, 2013		372		$	34.14
	Granted		—
	Vested or settled		(96	)		33.99
	Forfeited		(68	)		33.41
	Unvested at June 30, 2014		208		$	34.45
Summary of Stock-Based Compensation Recorded in Expense Categories	'
	Stock-based compensation was recorded in the following expense categories (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Cost of services and fulfillment	$	798		$	743		$	1,871		$	1,647
	Selling and marketing		127			150			465			572
	General and administrative		293			(25	)		829			509
	Total	$	1,218		$	868		$	3,165		$	2,728
Assumptions for Valuation of Options Granted under Equity Incentive Plans and Shares Subject to Purchase under Employee Stock Purchase Plan	'
	Options granted under the equity incentive plans and shares subject to purchase under the employee stock purchase plan were valued using the following assumptions:
		Three Months Ended						Three Months Ended
		June 30, 2014						June 30, 2013
		Equity Incentive			Employee Stock			Equity Incentive			Employee Stock
		Plans			Purchase Plan			Plans			Purchase Plan
	Average risk-free interest rate		1.7	%		0.08	%		0.71	%		0.11	%
	Expected dividend yield		1.8	%		1.8	%		2.1	%		2.1	%
	Expected life		5.1 Years			0.5 Years			4.9 Years			0.5 Years
	Expected volatility		30	%		25	%		36	%		25	%
	Weighted average fair value	$	8.67		$	7.81		$	9.27		$	5.97
		Six Months Ended						Six Months Ended
		June 30, 2014						June 30, 2013
		Equity Incentive			Employee Stock			Equity Incentive			Employee Stock
		Plans			Purchase Plan			Plans			Purchase Plan
	Average risk-free interest rate		1.66	%		0.08	%		0.72	%		0.11	%
	Expected dividend yield		1.8	%		1.8	%		2.1	%		2.1	%
	Expected life		5.1 Years			0.5 Years			4.8 Years			0.5 Years
	Expected volatility		30	%		25	%		37	%		25	%
	Weighted average fair value	$	8.76		$	7.81		$	9.05		$	5.97

Operating_Segments_Tables

Operating Segments (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Summary of Information about Reportable Segments	'
		Products		Research			Project			Consolidated
							Consulting
	Three Months Ended June 30, 2014
	Research services revenues	$	52,322	$	—		$	—		$	52,322
	Advisory services and events revenues		9,994		12,672			7,959			30,625
	Total segment revenues		62,316		12,672			7,959			82,947
	Segment expenses		11,894		13,399			6,438			31,731
	Contribution margin (loss)		50,422		(727	)		1,521			51,216
	Selling, marketing, administrative and other expenses										(42,561	)
	Amortization of intangible assets										(536	)
	Reorganization costs										(1,039	)
	Other income and gains/losses on investments										122
	Income before income taxes									$	7,202
		Products		Research			Project			Consolidated
							Consulting
	Three Months Ended June 30, 2013
	Research services revenues	$	51,312	$	—		$	—		$	51,312
	Advisory services and events revenues		9,482		14,812			3,347			27,641
	Total segment revenues		60,794		14,812			3,347			78,953
	Segment expenses		10,924		14,704			3,624			29,252
	Contribution margin (loss)		49,870		108			(277	)		49,701
	Selling, marketing, administrative and other expenses										(39,045	)
	Amortization of intangible assets										(554	)
	Reorganization costs										(314	)
	Other income and gains/losses on investments										353
	Income before income taxes									$	10,141
		Products		Research			Project			Consolidated
							Consulting
	Six Months Ended June 30, 2014
	Research services revenues	$	103,115	$	—		$	—		$	103,115
	Advisory services and events revenues		12,851		26,648			13,404			52,903
	Total segment revenues		115,966		26,648			13,404			156,018
	Segment expenses		20,245		27,374			12,115			59,734
	Contribution margin (loss)		95,721		(726	)		1,289			96,284
	Selling, marketing, administrative and other expenses										(86,221	)
	Amortization of intangible assets										(1,075	)
	Reorganization costs										(1,888	)
	Other income and gains/losses on investments										95
	Income before income taxes									$	7,195
		Products		Research			Project			Consolidated
							Consulting
	Six Months Ended June 30, 2013
	Research services revenues	$	101,590	$	—		$	—		$	101,590
	Advisory services and events revenues		11,701		29,750			7,273			48,724
	Total segment revenues		113,291		29,750			7,273			150,314
	Segment expenses		18,494		28,586			6,973			54,053
	Contribution margin (loss)		94,797		1,164			300			96,261
	Selling, marketing, administrative and other expenses										(80,175	)
	Amortization of intangible assets										(1,113	)
	Reorganization costs										(1,905	)
	Other income and gains/losses on investments										529
	Income before income taxes									$	13,597

Interim_Consolidated_Financial3

Interim Consolidated Financial Statements - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Mar. 31, 2013
			Depreciation Expenses [Member]	Other Immaterial Expenses [Member]	Research Services Revenue [Member]	Adjustments Related to Insignificant Variances in Deferred Revenue [Member]	Adjustments To Gains Losses On Investments [Member]	Adjustments To Gains Losses On Investments [Member]
Out-of-period corrections	$0.50	'	$0.40	$0.10	'	'	'	'
Adjustments related to prior period	'	'	'	'	$0.80	($0.10)	$0.10	($0.10)
Revised consolidated statements of comprehensive income description	'	'The consolidated statement of comprehensive income for the three and six months ended June 30, 2013 is impacted by the same amount as net income for the period.	'	'	'	'	'	'

Interim_Consolidated_Financial4

Interim Consolidated Financial Statements - Revised Consolidated Financial Statements (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'	'	'
Net income	$4,289	$6,185	$4,223	$8,354
Prepaid expenses and other current assets	'	'	-797	4,879
Deferred revenue	'	'	-9,110	-13,606
Net cash provided by operating activities	'	'	35,281	37,231
Revenues:	'	'	'	'
Research services	52,322	51,312	103,115	101,590
Advisory services and events	30,625	27,641	52,903	48,724
Total revenues	82,947	78,953	156,018	150,314
Income from operations	7,080	9,788	7,100	13,068
Gains (losses) on investments, net	43	98	80	-102
Income before income taxes	7,202	10,141	7,195	13,597
Income tax provision	2,913	3,956	2,972	5,243
Net income	4,289	6,185	4,223	8,354
Basic income per common share	$0.23	$0.29	$0.22	$0.38
Diluted income per common share	$0.23	$0.28	$0.22	$0.38
As Previously Reported [Member]	'	'	'	'
Cash flows from operating activities:	'	'	'	'
Net income	'	5,622	'	7,963
Prepaid expenses and other current assets	'	'	'	4,619
Deferred revenue	'	'	'	-12,955
Net cash provided by operating activities	'	'	'	37,231
Revenues:	'	'	'	'
Research services	'	50,512	'	100,890
Advisory services and events	'	27,652	'	48,773
Total revenues	'	78,164	'	149,663
Income from operations	'	8,999	'	12,417
Gains (losses) on investments, net	'	-51	'	-102
Income before income taxes	'	9,203	'	12,946
Income tax provision	'	3,581	'	4,983
Net income	'	5,622	'	7,963
Basic income per common share	'	$0.26	'	$0.37
Diluted income per common share	'	$0.26	'	$0.36
Adjustments [Member]	'	'	'	'
Cash flows from operating activities:	'	'	'	'
Net income	'	563	'	391
Prepaid expenses and other current assets	'	'	'	260
Deferred revenue	'	'	'	-651
Revenues:	'	'	'	'
Research services	'	800	'	700
Advisory services and events	'	-11	'	-49
Total revenues	'	789	'	651
Income from operations	'	789	'	651
Gains (losses) on investments, net	'	149	'	'
Income before income taxes	'	938	'	651
Income tax provision	'	375	'	260
Net income	'	$563	'	$391
Basic income per common share	'	$0.03	'	$0.01
Diluted income per common share	'	$0.02	'	$0.02

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Beginning Balance	$2,510	($813)	$2,454	$588
Foreign currency translation	-106	16	-61	-1,339
Unrealized gain (loss) on investments before reclassification, net of tax	27	-394	33	-440
Reclassification adjustment for net gain (loss) realized in net income, net of tax	-2	24	3	24
Ending Balance	2,429	-1,167	2,429	-1,167
Net Unrealized Gain (Loss) on Marketable Investments [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Beginning Balance	27	-1,070	16	-1,024
Unrealized gain (loss) on investments before reclassification, net of tax	27	-394	33	-440
Reclassification adjustment for net gain (loss) realized in net income, net of tax	-2	24	3	24
Ending Balance	52	-1,440	52	-1,440
Cumulative Translation Adjustment [Member]	'	'	'	'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Beginning Balance	2,483	257	2,438	1,612
Foreign currency translation	-106	16	-61	-1,339
Ending Balance	$2,377	$273	$2,377	$273

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Parenthetical) (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income Loss Tax Parenthetical Disclosures [Abstract]	'	'	'	'
Tax on Unrealized gain (loss) on investments before reclassification	$27	$238	$27	$241
Tax on Reclassification adjustment for net gain (loss) realized in net income	$2	$15	$2	$15

Marketable_Investments_Summary

Marketable Investments - Summary of Company's Marketable Investments (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$80,938	$80,988
Gross Unrealized Gains	119	117
Gross Unrealized Losses	-33	-92
Total	81,024	81,013
State and Municipal Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	4,203	6,809
Gross Unrealized Gains	3	5
Gross Unrealized Losses	'	'
Total	4,206	6,814
Federal Agency and Corporate Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	76,735	74,179
Gross Unrealized Gains	116	112
Gross Unrealized Losses	-33	-92
Total	$76,818	$74,199

Marketable_Investments_Summary1

Marketable Investments - Summary of Maturity Periods of the Marketable Securities (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
FY 2014	$9,079	'
FY2015	44,031	'
FY2016	18,272	'
Thereafter	9,642	'
Total	81,024	81,013
State and Municipal Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
FY 2014	2,201	'
FY2015	2,005	'
Total	4,206	6,814
Federal Agency and Corporate Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
FY 2014	6,878	'
FY2015	42,026	'
FY2016	18,272	'
Thereafter	9,642	'
Total	$76,818	$74,199

Marketable_Investments_Summary2

Marketable Investments - Summary of Gross Unrealized Losses and Market Value of Available-for-Sale Securities with Unrealized Losses (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale securities, Less Than 12 Months, Market Value	$15,426	$30,645
Available for sale securities, Less Than 12 Months, Unrealized Losses	33	92
Available for sale securities, 12 Months or Greater, Market Value	'	'
Available for sale securities, 12 Months or Greater, Unrealized Losses	'	'
State and Municipal Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale securities, Less Than 12 Months, Market Value	'	'
Available for sale securities, Less Than 12 Months, Unrealized Losses	'	'
Available for sale securities, 12 Months or Greater, Market Value	'	'
Available for sale securities, 12 Months or Greater, Unrealized Losses	'	'
Federal Agency and Corporate Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available for sale securities, Less Than 12 Months, Market Value	15,426	30,645
Available for sale securities, Less Than 12 Months, Unrealized Losses	33	92
Available for sale securities, 12 Months or Greater, Market Value	'	'
Available for sale securities, 12 Months or Greater, Unrealized Losses	'	'

Marketable_Investments_Summary3

Marketable Investments - Summary of Company's Fair Value Hierarchy for its Financial Assets (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	$82,757	$94,160
Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	1,733	6,897
State and Municipal Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	4,206	6,814
Federal Agency and Corporate Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	76,818	80,449
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	1,733	6,897
Level 1 [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	1,733	6,897
Level 1 [Member] | State and Municipal Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'
Level 1 [Member] | Federal Agency and Corporate Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	81,024	87,263
Level 2 [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'
Level 2 [Member] | State and Municipal Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	4,206	6,814
Level 2 [Member] | Federal Agency and Corporate Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	76,818	80,449
Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'
Level 3 [Member] | Money Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'
Level 3 [Member] | State and Municipal Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'
Level 3 [Member] | Federal Agency and Corporate Obligations [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of assets on recurring basis	'	'

Marketable_Investments_Summary4

Marketable Investments - Summary of Company's Fair Value Hierarchy for its Financial Assets (Parenthetical) (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
		Federal Agency and Corporate Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents	'	$6.20
Original maturities	'90 days	'

NonMarketable_Investments_Addi

Non-Marketable Investments - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'	'	'
Carrying value of the Company's non-marketable investments	'	$4.30	'	$5.70
Gain (loss) from non-marketable investments	0.1	0.1	-0.1	'
Book value of investment	'	0.9	'	0.9
Gross distributions received from funds	'	'	0.2	'
Gross distributions received from cost and equity method investment	'	$1.40	'	'
Minimum [Member]	'	'	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'	'	'
Ownership interest of Company	'	5.00%	'	'

Reorganization_Additional_Info

Reorganization - Additional Information (Detail) (USD $)	3 Months Ended				12 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013
					Employee
Restructuring And Related Activities [Abstract]	'	'	'	'	'
Severance and related costs	$1	$0.80	$0.30	$1.60	$1.90
Percentage of workforce reduction	'	1.00%	'	'	2.50%
Number of additional employees terminated related to sales reorganization and other cost reduction initiatives	'	'	'	'	31

Reorganization_Summary_of_Roll

Reorganization - Summary of Rolls Forward of Activity in Reorganization Accrual (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Additions	$1,039	$314	$1,888	$1,905
Workforce Reduction [Member]	'	'	'	'
Restructuring Cost and Reserve [Line Items]	'	'	'	'
Accrual Beginning Balance	'	'	121	'
Additions	'	'	1,888	'
Cash payments	'	'	-875	'
Accrual Ending Balance	$1,134	'	$1,134	'

Net_Income_Per_Common_Share_Su

Net Income Per Common Share - Summary of Basic and Diluted Weighted Average Common Shares (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]	'	'	'	'
Basic weighted average common shares outstanding	18,757	21,256	19,184	21,781
Weighted average common equivalent shares	287	491	295	421
Diluted weighted average common shares outstanding	19,044	21,747	19,479	22,202
Options excluded from diluted weighted average share calculation as effect would have been anti-dilutive	602	295	582	746

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Stock Option Activity (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of Shares, Outstanding at December 31, 2013	1,734
Number of Shares, Granted	111
Number of Shares, Exercised	-110
Number of Shares, Forfeited	-57
Number of Shares, Outstanding at June 30, 2014	1,678
Number of Shares, Exercisable at June 30, 2014	943
Weighted - Average Exercise Price Per Share, Outstanding, Beginning balance	$31.85
Weighted - Average Exercise Price Per Share, Granted	$36.80
Weighted - Average Exercise Price Per Share, Exercised	$31.37
Weighted - Average Exercise Price Per Share, Forfeited	$34.57
Weighted - Average Exercise Price Per Share, Outstanding, Ending balance	$32.11
Weighted - Average Exercise Price Per Share, Exercisable at June 30, 2014	$29.96
Weighted - Average Remaining Contractual Term, Outstanding at June 30, 2014	'6 years 8 months 9 days
Weighted - Average Remaining Contractual Term, Exercisable at June 30, 2014	'5 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding at June 30, 2014	$9,710
Aggregate Intrinsic Value, Exercisable at June 30, 2014	$7,493

Stockholders_Equity_Details_of

Stockholders' Equity - Details of Restricted Stock Unit Activity (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Number of Shares, Unvested at December 31, 2013	372
Number of Shares, Granted	'
Number of Shares, Vested or settled	-96
Number of Shares, Forfeited	-68
Number of Shares, Unvested at June 30, 2014	208
Weighted-Average Grant Date Fair Value, Unvested, Beginning Balance	$34.14
Weighted-Average Grant Date Fair Value, Granted	'
Weighted-Average Grant Date Fair Value, Vested or settled	$33.99
Weighted-Average Grant Date Fair Value, Forfeited	$33.41
Weighted-Average Grant Date Fair Value , Unvested, Ending Balance	$34.45

Stockholders_Equity_Summary_of1

Stockholders' Equity - Summary of Stock-Based Compensation Recorded in Expense Categories (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total allocated share-based compensation expense	$1,218	$868	$3,165	$2,728
Cost of Services and Fulfillment [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total allocated share-based compensation expense	798	743	1,871	1,647
Selling and Marketing [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total allocated share-based compensation expense	127	150	465	572
General and Administrative [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Total allocated share-based compensation expense	$293	($25)	$829	$509

Stockholders_Equity_Assumption

Stockholders' Equity - Assumptions for Valuation of Options Granted under Equity Incentive Plans and Shares Subject to Purchase under Employee Stock Purchase Plan (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity Incentive Plans [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Average risk-free interest rate	1.70%	0.71%	1.66%	0.72%
Expected dividend yield	1.80%	2.10%	1.80%	2.10%
Expected life	'5 years 1 month 6 days	'4 years 10 months 24 days	'5 years 1 month 6 days	'4 years 9 months 18 days
Expected volatility	30.00%	36.00%	30.00%	37.00%
Weighted average fair value	$8.67	$9.27	$8.76	$9.05
Employee Stock Purchase Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Average risk-free interest rate	0.08%	0.11%	0.08%	0.11%
Expected dividend yield	1.80%	2.10%	1.80%	2.10%
Expected life	'6 months	'6 months	'6 months	'6 months
Expected volatility	25.00%	25.00%	25.00%	25.00%
Weighted average fair value	$7.81	$5.97	$7.81	$5.97

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended				6 Months Ended		1 Months Ended
In Millions, except Per Share data, unless otherwise specified	Apr. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Jul. 31, 2014
								Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'	'	'
Dividend declared and paid per share	'	$0.16	$0.16	$0.15	$0.15	'	'	'
Aggregate dividend declared for the year	'	'	'	'	'	$6.10	$6.40	'
Dividend declared per share	'	$0.16	'	$0.15	'	$0.32	$0.30	$0.16
Dividend payable date	'	'	'	'	'	'	'	17-Sep-14
Dividend payable record date	'	'	'	'	'	'	'	3-Sep-14
Authorized to purchase of common stock under the stock repurchase program	'	'	'	'	'	410	'	'
Additional purchase of common stock	25	'	'	'	'	'	'	'
Repurchase of common Stock	'	'	'	'	'	1.5	'	'
Cumulative aggregate cost of repurchase of common stock	'	'	'	'	'	54.9	'	'
Cumulative repurchase of common stock	'	13.9	'	'	'	13.9	'	'
Aggregate cost of repurchase of common stock	'	'	'	'	'	$384	'	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income tax expense	$2,913,000	$3,956,000	$2,972,000	$5,243,000
Effective income tax rate	'	'	41.30%	38.60%
Increase in the effective tax	'	'	$200,000	'

Operating_Segments_Summary_of_

Operating Segments - Summary of Information about Reportable Segments (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Research services revenues	$52,322	$51,312	$103,115	$101,590
Advisory services and events revenues	30,625	27,641	52,903	48,724
Total segment revenues	82,947	78,953	156,018	150,314
Segment expenses	31,731	29,252	59,734	54,053
Contribution margin (loss)	51,216	49,701	96,284	96,261
Selling, marketing, administrative and other expenses	-42,561	-39,045	-86,221	-80,175
Amortization of intangible assets	-536	-554	-1,075	-1,113
Reorganization costs	-1,039	-314	-1,888	-1,905
Other income and gains/losses on investments	122	353	95	529
Income before income taxes	7,202	10,141	7,195	13,597
Products Segment [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Research services revenues	52,322	51,312	103,115	101,590
Advisory services and events revenues	9,994	9,482	12,851	11,701
Total segment revenues	62,316	60,794	115,966	113,291
Segment expenses	11,894	10,924	20,245	18,494
Contribution margin (loss)	50,422	49,870	95,721	94,797
Research Segment [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Advisory services and events revenues	12,672	14,812	26,648	29,750
Total segment revenues	12,672	14,812	26,648	29,750
Segment expenses	13,399	14,704	27,374	28,586
Contribution margin (loss)	-727	108	-726	1,164
Project Consulting [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Advisory services and events revenues	7,959	3,347	13,404	7,273
Total segment revenues	7,959	3,347	13,404	7,273
Segment expenses	6,438	3,624	12,115	6,973
Contribution margin (loss)	$1,521	($277)	$1,289	$300