Revenue Recognition  As discussed in Recently Issued Accounting Standards in this Note 3, the Company adopted ASU No. 2016-02, Leases (ASC 842) on January 1, 2019. Prior to the adoption of ASC 842, the Company recognized leasing revenues on a straight-line basis over the applicable lease term when collectability is reasonably assured. Recognizing leasing income on a straight-line basis generally results in recognized revenues during the first half of the lease term in excess of cash amounts contractually due from our tenants, creating a straight-line rent receivable. We lease certain assets to Windstream under a triple-net lease, whereby Windstream is responsible for the costs related to operating the Distribution Systems, including property taxes, insurance and maintenance and repair costs. As a result, we do not record an obligation related to the payment of property taxes or insurance, as Windstream makes direct payments to the taxing authorities and insurance carriers, respectively. The Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (Topic 606) on January 1, 2018 (see Note 4). Prior to the adoption of Topic 606, t he Company recognized service revenues related to its broadband transport and backhaul communications services when (i) persuasive evidence of an arrangement exists, (ii) the services have been provided to the customer, (iii) the sales price was fixed or determinable, and (iv) the collection of the sales price is reasonably assured. Services provided to the Companys customers are rendered pursuant to contractual fee-based arrangements, which generally provide for recurring fees charged for the use of designated portions of the Companys network and typically range for a period of three to ten years. The Companys revenue arrangements often include upfront fees charged to the customer for the cost of establishing the necessary components of the Companys network prior to the commencement of use by the customer. Fees charged to customers for the recurring use of the Companys network are recognized during the related periods of service. Upfront fees that are billed in advance of providing services are deferred until such time the customer accepts the Companys network and then are recognized as service revenues ratably over a period in which substantive services required under the revenue arrangement are expected to be performed, which is the initial term of the arrangement. We evaluate the collectability of service receivables by considering a variety of factors. The Company typically does not require collateral. When the Company becomes aware of a specific customers inability to meet its financial obligations, the Company records a specific reserve for bad debt to reduce the related accounts receivable to the amount the Company reasonably believes is collectible. When appropriate, the Company also records reserves for bad debts for all other customers based on a variety of factors including the length of time the receivable is past due, the financial health of the customer, macroeconomic considerations and historical experience. If circumstances related to specific customers change, the Company adjusts its estimates of the recoverability of receivables as needed. At December 31, 2019 and 2018, the allowance recorded for service receivables was $2.7 million and $2.3 million, respectively. Consumer CLEC Business revenues are primarily derived from providing access to or usage of leased networks and facilities and are recognized over the period that the corresponding services are rendered to customers. Revenues derived from other telecommunications services, including broadband, long distance and enhanced service revenues are recognized monthly as services are provided. Sales of customer premise equipment and modems are recognized when products are delivered to and accepted by customers.