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Revenue and Receivables (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table presents the Company’s disaggregated revenue:
Years Ended December 31,
(in thousands)202120202019
CSB:
Monitoring and related services$3,873,285 $3,760,614 $3,891,075 
Installation and other272,743 564,575 189,272 
Total CSB4,146,028 4,325,189 4,080,347 
Commercial:
Monitoring and related services474,428 426,373 416,507 
Installation and other639,304 563,225 628,803 
Total Commercial1,113,732 989,598 1,045,310 
Solar:
Installation and other47,351 — — 
Total Solar47,351 — — 
Total revenue$5,307,111 $5,314,787 $5,125,657 
Amortization of Deferred Subscriber Acquisition Revenue
Amortization of deferred subscriber acquisition revenue is reflected in installation and other revenue in the Consolidated Statements of Operations as follows:
Years Ended December 31,
(in thousands)
202120202019
Amortization of deferred subscriber acquisition revenue$172,061 $124,804 $107,284 
Schedule of Revenue and Cost of Revenue from Products Sales
Revenue and cost of revenue from products in outright sales were as follows:
Years Ended December 31,
(in thousands)
202120202019
Revenue from product sales$777,611 $997,876 $709,242 
Cost of revenue from product sales$635,518 $726,622 $573,691 
Allowance for Credit Loss Rollforward
Changes in the allowance for credit losses on accounts receivable were as follows:
Years Ended December 31,
(in thousands)2021
2020(1)
2019
Beginning balance $68,342 $42,960 $39,765 
Provision for credit losses(2)
51,877 81,713 56,060 
Write-offs, net of recoveries(3)
(66,187)(56,331)(51,488)
Ending balance$54,032 $68,342 $44,337 
________________
(1)Beginning balance reflected is subsequent to the adoption of ASU 2016-13, Measurement of Credit Losses on Financial Instruments, and related amendments on January 1, 2020. The impact of adoption was not material.
(2)The provision for credit losses during 2020 includes an increase related to the COVID-19 Pandemic.
(3)The amount of recoveries was not material for the periods presented. As such, the Company presented write-offs, net of recoveries.
Schedule of Unbilled Retail Installment Contract Receivables, Net
Unbilled retail installment contract receivables reflected in the Consolidated Balance Sheets were as follows:
December 31,
(in thousands)20212020
Retail installment contract receivables, gross$331,512 $145,957 
Allowance for credit losses(907)(4,366)
Retail installment contract receivables, net$330,605 $141,591 
Classification:
Accounts receivable, net$100,385 $47,023 
Other assets230,220 94,568 
Retail installment contract receivables, net$330,605 $141,591 
Contract with Customer, Contract Asset, Contract Liability, and Receivable
Contract assets for residential transactions reflected in the Consolidated Balance Sheets were as follows:
December 31,
(in thousands)20212020
Contract assets, gross$106,810 $161,563 
Allowance for credit losses(12,300)(29,558)
Contract assets, net$94,510 $132,005 
Classification:
Prepaid expenses and other current assets$58,452 $59,382 
Other assets36,058 72,623 
Contract assets, net$94,510 $132,005