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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of Restricted Stock Unit Activity

Restricted stock unit activity for the six months ended June 30, 2018 is presented below (in thousands, except per share data):

						Weighted-
						Average
		Number of				Grant Date
		Shares				Fair Value
Unvested at December 31, 2017			509			$	37.59
Granted			34				40.66
Vested			(25	)			36.56
Forfeited			(23	)			37.07
Unvested at June 30, 2018			495			$	37.88

Schedule of Stock Option Activity

Stock option activity for the six months ended June 30, 2018 is presented below (in thousands, except per share data and contractual term):

						Weighted -				Weighted -
						Average				Average
						Exercise				Remaining				Aggregate
		Number				Price Per				Contractual				Intrinsic
		of Shares				Share				Term (in years)				Value
Outstanding at December 31, 2017			937			$	35.10
Granted			—				—
Exercised			(82	)			33.66
Forfeited			(11	)			35.02
Outstanding at June 30, 2018			844			$	35.24				5.55			$	5,658
Exercisable at June 30, 2018			605			$	35.24				4.99			$	4,055
Vested and expected to vest at June 30, 2018			844			$	35.24				5.55			$	5,658

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,
		2018				2017				2018				2017
Cost of services and fulfillment		$	1,108			$	1,103			$	2,127			$	2,299
Selling and marketing			246				202				491				364
General and administrative			754				891				1,453				1,582
Total		$	2,108			$	2,196			$	4,071			$	4,245

Shares Subject to Employee Stock Purchase Plan Valuation Assumptions

Forrester utilizes the Black-Scholes valuation model for estimating the fair value of shares subject to purchase under the employee stock purchase plan, which were valued using the following assumptions:

		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2018				2017				2018				2017
Average risk-free interest rate			1.92	%			0.88	%			1.62	%			0.74	%
Expected dividend yield			2.0	%			1.9	%			2.0	%			1.9	%
Expected life		0.5 Years				0.5 Years				0.5 Years				0.5 Years
Expected volatility			22	%			28	%			22	%			26	%
Weighted average fair value		$	8.49			$	8.49			$	8.50			$	8.21

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Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

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-Section 50
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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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