Revenue Recognition

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

The following table summarizes disaggregated revenue information by geographic area based upon the customer's country of domicile (in thousands):



	Year Ended December 31,
	2019		2018		2017
Americas	$	277,155	$	265,175	214,338
Europe	227,738		311,914		328,826
Greater China	115,061		123,708		108,738
Other Asia	105,671		105,541		114,181
	$	725,625	$	806,338	$	766,083

The following table summarizes disaggregated revenue information by revenue type (in thousands):



	Year Ended December 31,
	2019		2018		2017
Standard products and services	$	629,220	$	654,509	$	603,196
Application-specific customer solutions	96,405		151,829		162,887
	$	725,625	$	806,338	$	766,083

Costs to Fulfill a Contract

Costs to fulfill a contract are included in "Prepaid expenses and other current assets" on the Consolidated Balance Sheet and amounted to $3,963,000 and $3,514,000 as of December 31, 2019 and 2018, respectively.

Accounts Receivable, Contract Assets, and Contract Liabilities

Accounts receivable represent amounts billed and currently due from customers which are reported at their net estimated realizable value. The Company maintains reserves against its accounts receivable for potential credit losses. Credit losses recognized on accounts receivable were immaterial for the year ended December 31, 2019 and 2018. Contract assets consist of unbilled revenue which arises when revenue is recognized in advance of billing for certain application-specific customer solutions contracts. Contract liabilities consist of deferred revenue and customer deposits which arise when amounts are billed to or collected from customers in advance of revenue recognition.

The following table summarizes the deferred revenue and customer deposits activity (in thousands):



	Amount
Balance as of December 31, 2017	$	9,420
Increases to deferred revenue and customer deposits	63,231
Recognition of revenue	(61,819		)
Foreign exchange rate changes	(987		)
Balance as of December 31, 2018	9,845
Increases to deferred revenue and customer deposits	53,422
Recognition of revenue	(48,730		)
Foreign exchange rate changes	(105		)
Balance as of December 31, 2019	$	14,432

As a practical expedient, the Company has elected not to disclose the aggregate amount of the transaction price allocated to unsatisfied performance obligations, as our contracts have an original expected duration of less than one year.