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Customer Concentration | 12 Months Ended
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Dec. 31, 2018
Significant Contractual Relationship [Abstract] |
Customer Concentration | Customer Concentration Significant Contractual Relationship In 1999, the Company executed a Management Agreement (the “Agreement”) with Sprint whereby the Company committed to construct and operate a PCS network using CDMA air interface technology. The Agreement has been amended numerous times. Under the amended Agreement, the Company is the exclusive PCS Affiliate of Sprint providing wireless mobility communications network products and services on the 800 MHz, 1900 MHz and 2.5 GHz spectrum ranges in its territory across a multi-state area covering large portions of central and western Virginia, south-central Pennsylvania, West Virginia, and portions of Maryland, North Carolina, Kentucky, and Ohio. Effective February 1, 2018, the Company amended its Agreement with Sprint to expand its wireless service area to include certain areas in Kentucky, Pennsylvania, Virginia and West Virginia. See Note 4 for further information about this expansion agreement. As an exclusive PCS Affiliate of Sprint, the Company has the exclusive right to build, own and maintain its portion of Sprint’s nationwide PCS network, in the aforementioned areas, to Sprint’s specifications. The initial term of the Agreement extends through November 2029, with two successive 10-year renewal periods, unless terminated by either party under provisions outlined in the Agreement. Upon non-renewal by either party, the Company may cause Sprint to buy or Sprint may cause the Company to sell the business at 90% of Entire Business Value (“EBV”) as defined in the Agreement. EBV in the Agreement is defined as i) the fair market value of a going concern paid by a willing buyer to a willing seller; ii) valued as if the business will continue to utilize existing brands and operate under existing agreements; and, iii) valued as if Manager (Shentel) owns the spectrum. Determination of EBV is made by an independent appraisal process. Accounts Receivable Accounts receivable are recorded at the invoiced amount and generally do not bear interest. Accounts receivable are concentrated among customers within the Company's geographic service area and large telecommunications companies. The Company has one major customer relationship with Sprint that is a significant source of revenue. Accounts receivable from significant clients, those representing 10% or more of total accounts receivable for the dates noted, are summarized below:
|  | December 31,
($ in thousands) |  | 2018 |  | 2017
Sprint |  | $43,227 |  | $43,405
% of total accounts receivable |  | 79% |  | 80%
Correspondingly, revenue from significant clients, those representing 10% or more of total revenue for the respective periods, is summarized as follows:
|  | Year Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Sprint |  | 68% |  | 72% |  | 69%

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- Definition The entire disclosure for collaborative arrangements in which the entity is a participant, including a) information about the nature and purpose of such arrangements; b) its rights and obligations thereunder; c) the accounting policy for collaborative arrangements; and d) the income statement classification and amounts attributable to transactions arising from the collaborative arrangement between participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 808 -URI http://asc.fasb.org/topic&trid=5833765 + Details
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