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Revenues | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Revenues | Revenues On January 1, 2018, we adopted Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. We recorded a net increase to retained earnings of $2.6 million as of January 1, 2018 due to the cumulative impact of adopting Topic 606, with the impact primarily related to sales commissions and software revenues within our Industrial Solutions segment. Revenues are recognized when control of the promised goods or services is transferred to our customers and in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. Taxes collected from customers and remitted to governmental authorities are not included in our revenues. We do not evaluate a contract for a significant financing component when the time between cash collection and performance is less than one year. The following table presents our revenues disaggregated by major product category (in thousands).
|  | Broadband and 5G |  | Cyber-Security |  | Industrial Automation |  | Smart Buildings |  | Total Revenues
Year Ended December 31, 2020 |  |  |  |  |  |  |  |  |  |
Enterprise Solutions |  | $ | 432,262 |  |  | $ | — |  |  | $ | — |  |  | $ | 440,155 |  |  | $ | 872,417 |
Industrial Solutions |  | — |  |  | 110,524 |  |  | 879,775 |  |  | — |  |  | 990,299 |
Total |  | $ | 432,262 |  |  | $ | 110,524 |  |  | $ | 879,775 |  |  | $ | 440,155 |  |  | $ | 1,862,716 |
Year Ended December 31, 2019 |  |  |  |  |  |  |  |  |  |
Enterprise Solutions |  | $ | 401,415 |  |  | $ | — |  |  | $ | — |  |  | $ | 544,626 |  |  | $ | 946,041 |
Industrial Solutions |  | — |  |  | 133,039 |  |  | 1,052,198 |  |  | — |  |  | 1,185,237 |
Total |  | $ | 401,415 |  |  | $ | 133,039 |  |  | $ | 1,052,198 |  |  | $ | 544,626 |  |  | $ | 2,131,278 |
Year Ended December 31, 2018 |  |  |  |  |  |  |  |  |  |
Enterprise Solutions |  | $ | 389,246 |  |  | $ | — |  |  | $ | — |  |  | $ | 568,255 |  |  | $ | 957,501 |
Industrial Solutions |  | — |  |  | 136,648 |  |  | 1,071,553 |  |  | — |  |  | 1,208,201 |
Total |  | $ | 389,246 |  |  | $ | 136,648 |  |  | $ | 1,071,553 |  |  | $ | 568,255 |  |  | $ | 2,165,702 |
The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product (in thousands).
|  | Americas |  | EMEA |  | APAC |  | Total Revenues
Year Ended December 31, 2020 |  |  |  |  |  |  |  |
Enterprise Solutions |  | $ | 636,492 |  |  | $ | 130,982 |  |  | $ | 104,943 |  |  | $ | 872,417 |
Industrial Solutions |  | 577,929 |  |  | 256,673 |  |  | 155,697 |  |  | 990,299 |
Total |  | $ | 1,214,421 |  |  | $ | 387,655 |  |  | $ | 260,640 |  |  | $ | 1,862,716 |
Year Ended December 31, 2019 |  |  |  |  |  |  |  |
Enterprise Solutions |  | $ | 695,008 |  |  | $ | 135,732 |  |  | $ | 115,301 |  |  | $ | 946,041 |
Industrial Solutions |  | 742,563 |  |  | 274,030 |  |  | 168,644 |  |  | 1,185,237 |
Total |  | $ | 1,437,571 |  |  | $ | 409,762 |  |  | $ | 283,945 |  |  | $ | 2,131,278 |
Year Ended December 31, 2018 |  |  |  |  |  |  |  |
Enterprise Solutions |  | $ | 700,499 |  |  | $ | 135,217 |  |  | $ | 121,785 |  |  | $ | 957,501 |
Industrial Solutions |  | 758,165 |  |  | 290,562 |  |  | 159,474 |  |  | 1,208,201 |
Total |  | $ | 1,458,664 |  |  | $ | 425,779 |  |  | $ | 281,259 |  |  | $ | 2,165,702 |
We generate revenues primarily by selling products that provide secure and reliable transmission of data, sound, and video for mission critical applications. We also generate revenues from providing support and professional services. We sell our products to distributors, end-users, installers, and directly to original equipment manufacturers. At times, we enter into arrangements that involve the delivery of multiple performance obligations. For these arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price and recognized when or as each performance obligation is satisfied. Most of our performance obligations related to the sale of products are satisfied at a point in time when control of the product is transferred based on the shipping terms of the arrangement. Generally, we determine standalone selling price using the prices charged to customers on a standalone basis. Typically, payments are due after control transfers, which is less than one year from satisfaction of the performance obligation. The amount of consideration we receive and revenue we recognize varies due to rebates, returns, and price adjustments. We estimate the expected rebates, returns, and price adjustments based on an analysis of historical experience, anticipated sales demand, and trends in product pricing. We adjust our estimate of revenue at the earlier of when the most likely amount of consideration we expect to receive changes or when the consideration becomes fixed. Adjustments to revenue for performance obligations satisfied in prior periods was not significant during the year ended December 31, 2020. The following table presents estimated and accrued variable consideration:
|  | December 31, 2020 |  | December 31, 2019
|  | (in thousands)
Accrued rebates |  | $ | 32,192 |  |  | $ | 37,170 |
Accrued returns |  | 13,016 |  |  | 10,974 |
Price adjustment recognized against gross accounts receivable |  | 25,244 |  |  | 28,672 |
Depending on the terms of an arrangement, we may defer the recognition of a portion of the consideration received because we have to satisfy a future obligation. Consideration allocated to support services under a support and maintenance contract is typically paid in advance and recognized ratably over the term of the service. The typical use of a time-elapsed unit of measure for support and maintenance contracts reflects the benefit and same pattern of transfer the customer receives from our services under this arrangement over the term of the contract. Consideration allocated to professional services is recognized when or as the services are performed depending on the terms of the arrangement. As of December 31, 2020, total deferred revenue was $77.6 million, and of this amount, $53.4 million is expected to be recognized within the next twelve months, and the remaining $24.2 million is long-term and will be recognized over a period greater than twelve months. The following table presents deferred revenue activity (in thousands):
Balance at December 31, 2018 |  | $ | 72,358 |
New deferrals |  | 111,812 |
Revenue recognized |  | (114,100) |
Balance at December 31, 2019 |  | $ | 70,070 |
New deferrals |  | 101,066 |
Revenue recognized |  | (93,488) |
Balance at December 31, 2020 |  | $ | 77,648 |
Service-type warranties represent $10.4 million of the deferred revenue balance at December 31, 2020, and of this amount $3.6 million is expected to be recognized in the next twelve months, and the remaining $6.8 million is long-term and will be recognized over a period greater than twelve months. We expense sales commissions as incurred when the duration of the related revenue arrangement is one year or less. We capitalize sales commissions in other current and long-lived assets on our balance sheet when the duration of the related revenue arrangement is longer than one year, and we amortize it over the related revenue arrangement period. Total capitalized sales commissions were $5.8 million, $3.4 million, and $2.9 million as of December 31, 2020, 2019, and 2018, respectively. For the years ended December 31, 2020, 2019 and 2018, we recognized $16.3 million, $19.0 million, and $20.3 million of sales commissions expense in selling, general, and administrative expenses, respectively.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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