Revenue and Related Matters (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue by Reportable Segment

Disaggregated Revenue — The Company's disaggregated revenue by reportable segment is presented in the tables below for the periods indicated (in thousands).

By Primary Geographic Market (1)

Three Months Ended March 31, 2020

Primary Geographic Market	Research		Conferences		Consulting		Total
United States and Canada	$	590,156	$	5,980	$	54,163	$	650,299
Europe, Middle East and Africa	205,939		2,147		30,082		238,168
Other International	113,196		5,743		11,485		130,424
Total revenues	$	909,291	$	13,870	$	95,730	$	1,018,891

Three Months Ended March 31, 2019

Primary Geographic Market	Research		Conferences		Consulting		Total
United States and Canada	$	527,233	$	29,007	$	55,093	$	611,333
Europe, Middle East and Africa	193,955		17,197		29,934		241,086
Other International	104,186		5,728		8,111		118,025
Total revenues	$	825,374	$	51,932	$	93,138	$	970,444

(1)Revenue is reported based on where the sale is fulfilled.

Schedule of Disaggregation of Revenue

By Timing of Revenue Recognition

Three Months Ended March 31, 2020

Timing of Revenue Recognition	Research		Conferences		Consulting		Total
Transferred over time (1)	$	829,212	$	—	$	81,408	$	910,620
Transferred at a point in time (2)	80,079		13,870		14,322		108,271
Total revenues	$	909,291	$	13,870	$	95,730	$	1,018,891

Three Months Ended March 31, 2019

Timing of Revenue Recognition	Research		Conferences		Consulting		Total
Transferred over time (1)	$	752,798	$	—	$	78,957	$	831,755
Transferred at a point in time (2)	72,576		51,932		14,181		138,689
Total revenues	825,374		$	51,932	$	93,138	$	970,444

(1)Research revenues were recognized in connection with performance obligations that were satisfied over time using a time-elapsed output method to measure progress. Consulting revenues were recognized over time using labor hours as an input measurement basis.

(2)The revenues in this category were recognized in connection with performance obligations that were satisfied at the point in time that the contractual deliverables were provided to the customer.

Schedule for Contract with Customer, Asset and Liability

The table below provides information regarding certain of the Company’s balance sheet accounts that pertain to its contracts with customers (in thousands).

	March 31,		December 31,
	2020		2019
Assets:
Fees receivable, gross (1)	$	1,157,565	$	1,334,012
Contract assets recorded in Prepaid expenses and other current assets (2)	$	19,558	$	21,350
Contract liabilities:
Deferred revenues (current liability) (3)	$	1,847,384	$	1,928,020
Non-current deferred revenues recorded in Other liabilities (3)	17,231		24,409
Total contract liabilities	$	1,864,615	$	1,952,429

(1)Fees receivable represent an unconditional right of payment from our customers and include both billed and unbilled amounts.

(2)Contract assets represent recognized revenue for which we do not have an unconditional right to payment as of the balance sheet date because the project may be subject to a progress billing milestone or some other billing restriction.

(3)Deferred revenues represent amounts (i) for which the Company has received an upfront customer payment or (ii) that pertain to recognized fees receivable. Both situations occur before the completion of our performance obligation(s).