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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table summarizes disaggregated revenue information by geographic area based on the customer's country of domicile (in thousands):
|  | Year Ended December 31,
|  | 2020 |  | 2019 |  | 2018 |  |
Americas |  | $ | 310,027 |  |  | $ | 277,155 |  |  | 265,175 |  |  |
Europe |  | 208,787 |  |  | 227,738 |  |  | 311,914 |  |  |
Greater China |  | 168,287 |  |  | 115,061 |  |  | 123,708 |  |  |
Other Asia |  | 123,919 |  |  | 105,671 |  |  | 105,541 |  |  |
|  | $ | 811,020 |  |  | $ | 725,625 |  |  | $ | 806,338 |  |  |
The following table summarizes disaggregated revenue information by revenue type (in thousands):
|  | Year Ended December 31,
|  | 2020 |  | 2019 |  | 2018
Standard products and services |  | $ | 674,830 |  |  | $ | 629,220 |  |  | $ | 654,509 |
Application-specific customer solutions |  | 136,190 |  |  | 96,405 |  |  | 151,829 |
|  | $ | 811,020 |  |  | $ | 725,625 |  |  | $ | 806,338 |
Contract with Customer, Liability | The following table summarizes the deferred revenue and customer deposits activity (in thousands):
| Amount
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 |
Increases to deferred revenue and customer deposits | 120,008 |
Recognition of revenue | (114,014) |
Foreign exchange rate changes | 848 |
Balance as of December 31, 2020 | $ | 21,274 |
Allowance for Credit Loss | The following table summarizes changes in the allowance for credit losses (in thousands):
| Amount
Balance as of December 31, 2018 | $ | 596 |
Increases to the allowance for credit losses | 215 |
Write-offs | (286) |
Foreign exchange rate changes | 5 |
Balance as of December 31, 2019 | 530 |
Increases to the allowance for credit losses | 600 |
Write-offs | (300) |
Foreign exchange rate changes | 1 |
Balance as of December 31, 2020 | $ | 831 |

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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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