Annual report pursuant to Section 13 and 15(d)

Other Assets

Other Assets
12 Months Ended
Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets Other Assets
Other assets consist of the following (in thousands): 
December 31,
2022 2021
Costs to obtain contracts - customer agreements $ 1,096,346  $ 703,080 
Costs to obtain contracts - incentives 2,481  2,481 
Accumulated amortization of costs to obtain contracts (112,968) (74,529)
Unbilled receivables 324,385  212,727 
Allowance for credit loss on unbilled receivables (3,322) (2,411)
Operating lease right-of-use assets 104,759  92,707 
Equity investment 186,197  63,826 
Other assets 229,640  127,862 
Total $ 1,827,518  $ 1,125,743 
    The Company recorded amortization of costs to obtain contracts of $38.7 million and $23.3 million for the years ended December 31, 2022 and 2021, respectively, in the sales and marketing expense.

    The majority of unbilled receivables arise from fixed price escalators included in the Company's long-term Customer Agreements. The escalator is included in calculating the total estimated transaction value for an individual Customer Agreement. The total estimated transaction value is then recognized over the term of the Customer Agreement. The amount of unbilled receivables increases while billings for an individual Customer Agreement are less than the revenue recognized for that Customer Agreement. Conversely, the amount of unbilled receivables decreases once the billings become higher than the amount of revenue recognized in the period. At the end of the initial term of a Customer Agreement, the cumulative amounts recognized as revenue and billed to date are the same, therefore the unbilled receivable balance for an individual Customer Agreement will be zero. The Company applies an estimated loss-rate in order to determine the current expected credit loss for unbilled receivables. The estimated loss-rate is determined by analyzing historical credit losses, residential first and second mortgage foreclosures and consumers' utility default rates, as well as current economic conditions. The Company reviews individual customer collection status of electricity billings to determine whether the unbilled receivables for an individual customer should be written off, including the possibility of a service transfer to a potential new homeowner.