Basis of Presentation and Other Information	9 Months Ended
Basis of Presentation and Other Information	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Other Information	Basis of Presentation and Other Information The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X for interim financial information. All normal recurring adjustments considered necessary for a fair presentation have been included. Certain disclosures normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) have been omitted. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes contained in our Annual Report on Form 10-K for the year ended December 31, 2019. The preparation of the unaudited interim consolidated financial statements requires management of the Company to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingencies at the date of the unaudited interim condensed consolidated financial statements. These estimates are inherently subject to judgment and actual results could differ. Revision of Prior Period Financial Statements In connection with the preparation of our unaudited condensed consolidated financial statements for the three months ended March 31, 2020, we determined that certain errors existed in our previously issued financial statements. Specifically: •Prepaid and other assets, a component of current assets held for sale, as of December 31, 2019, were understated by $2.7 million, deferred tax liabilities were understated by $0.7 million, and retained earnings were understated by $2.0 million as the result of a failure to properly account for handsets that were utilized as demo phones in certain wireless retail stores within our area of operation. All of the impact to retained earnings is attributable to 2017 and prior years. •Property, plant and equipment, net, classified as held for sale, and deferred income tax liabilities, as of December 31, 2019 were understated by $1.4 million and $0.4 million, respectively. Depreciation, contained within discontinued operations, was overstated by $1.4 million for the year and quarter ended December 31, 2019. Income tax expense and net income were understated by $0.4 million and $1.0 million, respectively, for the year and quarter ended December 31, 2019. We evaluated these errors under the U.S. Securities and Exchange Commission's ("SEC's") authoritative guidance on materiality and the quantification of the effect of prior period misstatements on financial statements, and we have determined that the impact of these errors on our prior period consolidated financial statements is immaterial. However, since the correction of these errors in the first quarter of 2020 could have become material to our results of operations for the year ending December 31, 2020, we revised our prior period financial statements to correct these errors herein. For the year and quarter ended December 31, 2019, the correction of these errors resulted in a $0.02 increase in both basic and diluted earnings per share from discontinued operations. Adoption of New Accounting Principles There have been no developments related to recently issued accounting standards, including the expected dates of adoption and estimated effects on the Company's unaudited condensed consolidated financial statements and note disclosures, from those disclosed in the Company's 2019 Annual Report on Form 10-K, that would be expected to impact the Company except for the following: The Company adopted ASU No. 2016-13, Financial Instruments - Credit Losses ("ASC 326"): Measurement of Credit Losses on Financial Instruments, as of January 1, 2020 using the modified retrospective transition method. ASC 326 requires the application of a current expected credit loss (“CECL”) impairment model to financial assets measured at amortized cost including trade accounts receivable, net investments in leases, and certain off-balance-sheet credit exposures. Under the CECL model, lifetime expected credit losses on such financial assets are measured and recognized at each reporting date based on historical, current, and forecasted information. Furthermore, the CECL model requires financial assets with similar risk characteristics to be analyzed on a collective basis. There was no significant impact to unaudited condensed consolidated financial statements upon adoption. The Company adopted ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software ("ASC 350"): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract, as of January 1, 2020. ASC 350 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Upon adoption of the standard, implementation costs were capitalized in the period incurred and will be amortized over the term of the hosting arrangement. There was no significant impact to unaudited condensed consolidated financial statements upon adoption. In March 2020, the FASB issued ASU 2020-04 “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This accounting update provides optional accounting relief to entities with contracts, hedge accounting relationships or other transactions that reference London Interbank Offering Rate (LIBOR) or other interest rate benchmarks for which the referenced rate is expected to be discontinued or replaced. This optional relief generally allows for contract modifications solely related to the replacement of the reference rate to be accounted for as a continuation of the existing contract instead of as an extinguishment of the contract, and therefore would not require reassessment of a previous accounting determination. The Company's Credit Agreement and interest rate swaps have LIBOR as a reference rate. We plan to apply the accounting relief as relevant contract modifications are made to our Credit Agreement and interest rate swap contracts during the course of the reference rate reform transition period. The optional relief can be applied beginning January 1, 2020, and ending December 31, 2022.