Lumos Networks (LMOS) 10-Q 8 May 17 2017 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 05, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Entity Registrant Name	Lumos Networks Corp.
Entity Central Index Key	1,520,744
Trading Symbol	LMOS
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		23,944,060

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets
Cash and cash equivalents	$ 19,947	$ 33,575
Marketable securities	14,859	38,081
Accounts receivable, net of allowance of $928 ($942 in 2016)	22,262	22,609
Other receivables	184	753
Income tax receivable	313	459
Prepaid expenses and other	7,696	5,028
Total Current Assets	65,261	100,505
Securities and Investments	1,521	1,479
Property, Plant and Equipment
Land and buildings	25,217	24,867
Network plant and equipment	749,434	733,154
Furniture, fixtures and other equipment	52,918	52,030
Total in service	827,569	810,051
Under construction	20,271	22,678
Property, plant and equipment, gross	847,840	832,729
Less accumulated depreciation and amortization	310,195	296,441
Total Property, Plant and Equipment, net	537,645	536,288
Other Assets
Goodwill	125,636	100,297
Other intangibles, less accumulated amortization of $98,560 ($97,467 in 2016)	20,540	8,503
Deferred charges and other assets	6,545	6,300
Total Other Assets	152,721	115,100
Total Assets	757,148	753,372
Current Liabilities
Current portion of long-term debt	13,525	13,530
Accounts payable	6,290	8,607
Advance billings and customer deposits	15,144	14,140
Accrued compensation	1,375	1,491
Accrued operating taxes	4,694	4,518
Other accrued liabilities	10,255	5,000
Total Current Liabilities	51,283	47,286
Long-term Liabilities
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	452,683	454,885
Retirement benefits	15,760	16,029
Deferred income taxes, net	92,134	96,988
Other long-term liabilities	7,317	2,124
Total Long-term Liabilities	567,894	570,026
Commitments and Contingencies
Equity
Preferred stock, par value $0.01 per share, authorized 100 shares, none issued
Common stock, par value $0.01 per share, authorized 55,000 shares; 24,058 shares issued and 23,932 shares outstanding (23,607 shares issued and 23,605 shares outstanding in 2016)	241	236
Additional paid-in capital	182,646	175,008
Treasury stock, 126 shares at cost (2 shares in 2016)	(2,234)	(2)
Accumulated deficit	(32,802)	(29,064)
Accumulated other comprehensive loss, net of tax	(10,799)	(11,004)
Total Lumos Networks Corp. Stockholders' Equity	137,052	135,174
Noncontrolling Interests	919	886
Total Equity	137,971	136,060
Total Liabilities and Equity	$ 757,148	$ 753,372

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 928	$ 942
Other intangibles, accumulated amortization	$ 98,560	$ 97,467
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000	100,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	55,000,000	55,000,000
Common stock, shares issued	24,058,000	23,607,000
Common stock, shares outstanding	23,932,000	23,605,000
Treasury stock, shares	126,000	2,000

Condensed Consolidated Statemen

Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements Of Operations [Abstract]
Operating Revenues	$ 54,916	$ 50,794
Operating Expenses
Cost of Revenue, exclusive of depreciation and amortization shown separately below	10,419	10,212
Selling, general and administrative, exclusive of depreciation and amortization shown separately below	30,668	23,335
Depreciation and amortization	14,992	11,891
Accretion of asset retirement obligations	25	34
Restructuring charges		2,207
Change in fair value of contingent consideration obligations	400
Total Operating Expenses	56,504	47,679
Operating (Loss) Income	(1,588)	3,115
Other Income (Expenses)
Interest expense	(7,393)	(6,989)
Other income, net	623	174
Total Other Expenses, net	(6,770)	(6,815)
Loss Before Income Taxes	(8,358)	(3,700)
Income Tax Benefit	(3,074)	(861)
Net Loss	(5,284)	(2,839)
Net Income Attributable to Noncontrolling Interests	(33)	(55)
Net Loss Attributable to Lumos Networks Corp.	$ (5,317)	$ (2,894)
Basic and Diluted Loss per Common Share Attributable to Lumos Networks Corp. Stockholders
Basic and diluted loss per share	$ (0.24)	$ (0.13)

Condensed Consolidated Stateme5

Condensed Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements Of Comprehensive Income [Abstract]
Net Loss	$ (5,284)	$ (2,839)
Other Comprehensive Income:
Reclassification adjustment for amortization of actuarial loss from defined benefit plans included in net loss (see Note 2)	326	338
Unrealized holding gain on available-for-sale marketable securities	8	41
Income Taxes	(129)	(148)
Other Comprehensive Income, Net of Tax	205	231
Total Comprehensive Loss	(5,079)	(2,608)
Less: Comprehensive Income Attributable to Noncontrolling Interests	(33)	(55)
Comprehensive Loss Attributable to Lumos Networks Corp.	$ (5,112)	$ (2,663)

Condensed Consolidated Stateme6

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities:
Net Loss	$ (5,284)	$ (2,839)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	13,899	11,247
Amortization	1,093	644
Accretion of asset retirement obligations	25	34
Change in fair value of contingent consideration obligations	400
Deferred income taxes	(3,075)	(982)
Equity-based compensation expense	6,794	5,813
Amortization of debt discount and issuance costs	1,175	1,099
Retirement benefits, net of cash contributions and distributions	57	94
Other	(333)	509
Changes in assets and liabilities from operations:
Decrease (increase) in accounts receivable	1,775	(1,656)
Increase in other assets	(1,816)	(3,595)
Changes in income taxes	146	2
Decrease in accounts payable	(153)	(2)
Increase in other current liabilities	231	2,010
Net Cash Provided by Operating Activities	14,934	12,378
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(13,097)	(22,006)
Purchases of available-for-sale marketable securities	(4,000)	(6,732)
Proceeds from sale or maturity of available-for-sale marketable securities	27,233	43,125
Net Cash (Used in) Provided by Investing Activities	(23,363)	14,387
Cash Flows from Financing Activities:
Principal payments on senior secured term loans	(3,258)
Principal payments under capital lease obligations	(124)	(107)
Proceeds from stock option exercises and employee stock purchase plan	609	28
Repurchases of common stock to settle tax withholding obligations on employee stock awards	(2,426)	(2,308)
Net Cash (Used in) Provided by Financing Activities	(5,199)	(2,387)
(Decrease) increase in cash and cash equivalents	(13,628)	24,378
Cash and Cash Equivalents:
Beginning of Year	33,575	13,267
End of Year	19,947	37,645
Data [Member]
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(10,909)	(21,390)
R&SB [Member]
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(2,247)	(2,222)
Corporate (Unallocated) [Member]
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	59	$ 1,606
Clarity Communications, LLC [Member]
Cash Flows from Operating Activities:
Net Loss	100
Cash Flows from Investing Activities:
Payments for acquisitions, net of cash acquired	(9,961)
DC74 LLC [Member]
Cash Flows from Operating Activities:
Net Loss	100
Cash Flows from Investing Activities:
Payments for acquisitions, net of cash acquired	$ (23,538)

Organization

Organization	3 Months Ended
	Mar. 31, 2017
Organization [Abstract]
Organization	Note 1. Organization Lumos Networks Corp. (“Lumos Networks” or the “Company”) is a fiber-based bandwidth infrastructure and service provider in the Mid-Atlantic region with a network of long-haul fiber, metro Ethernet and Ethernet rings offering end-to-end connectivity in 26 markets in Virginia, West Virginia, North Carolina, Pennsylvania, Maryland, Ohio and Kentucky . The Company serves carrier, business and residential customers over its fiber network offering data, voice and IP services. The Company’s principal products and services include Multiprotocol Label Switching (“MPLS”) based Ethernet, Metro Ethernet (“Metro E”), Fiber to the Cell (“FTTC”) wireless backhaul and fiber transport services, wavelength transport services, IP services and other voice services. In January 2017, the Company completed its acquisitions of Clarity Communications, LLC and DC74, LLC, for total consideration of up to approximately $15 million and $29.5 million, respectively, which expanded the Company’s operations into additional states in the southeastern region of the United States. See Note 4. Business Acquisitions for more information. On February 18, 2017, the Company entered into a definitive agreement (“Merger Agreement”) by and among the Company, MTN Infrastructure TopCo, Inc. (“Parent”) and MTN Infrastructure BidCo, Inc. (“Merger Sub”), pursuant to which the Company will be acquired by EQT Infrastructure i nvestment s trategy (“EQT Infrastructure”), subject to stock holder approval, regulatory approval and other customary closing conditions (“the Merger” or “EQT Merger”). Pursuant to the Merger Agreement, each outstanding share of common stock of the Company prior to the effective time of the Merger shall be automatically converted into the right to receive $18.00 in cash. See Note 3. EQT Merger for more information.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2017
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Principles of Consolidation and Basis of Presentation The condensed consolidated financial statements include the accounts of the Company, Lumos Networks Operating Company, a wholly-owned subsidiary of the Company, and all of Lumos Networks Operating Company’s wholly-owned subsidiaries and those limited liability corporations where Lumos Networks Operating Company or certain of its subsidiaries, as managing member, exercise control. All significant intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, the accompanying unaudited condensed consolidated financial statements as of and for the three months ended March 31, 2017 and 2016 contain all adjustments necessary to present fairly in all material respects the Company’s financial position and the results of operations and cash flows for all periods presented on the respective condensed consolidated financial statements included herein. The results of operations for the three months ended March 31, 2017 are not necessarily indicative of the results to be expected for the full year. The accompanying condensed consolidated balance sheet as of December 31, 2016 has been derived from the audited consolidated financial statements included in Part II, Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 .  Accounting Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the useful lives of fixed assets, the allowance for doubtful accounts and customer credits, deferred tax assets, asset retirement obligations, stock warrants and equity-based compensation, goodwill impairment assessments, contingent consideration obligations, reserves for employee benefit obligations and income tax uncertainties. Changes in Accounting Principle In January 2017, the Company adopted the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis (“ASU 2015-02”), which is effective for public companies for fiscal years beginning after September 1, 2016. ASU 2015-02 provides a revised consolidation model for all reporting entities to use in evaluating whether they should consolidate certain legal entities. All legal entities will be subject to reevaluation under this revised consolidation model. The revised consolidation model, among other things, (i) modifies the evaluation of whether limited partnerships and similar legal entities are VIEs, or voting interest entities, (ii) eliminates the presumption that a general partner should consolidate a limited partnership, and (iii) modifies the consolidation analysis of reporting entities that are involved with VIEs through fee arrangements and related party relationships. The Company’s condensed consolidated financial statements as of and for the three months ended March 31, 2017 and 2016 were not impacted by the adoption of ASU 2015-02. Additionally, the Company adopted FASB ASU 2016-09, Compensation – Stock Compensation (Topic 718) (“ASU 2016-09”) in January 2017, which simplifies the accounting for share-based payment transactions and is effective for public companies for annual reporting periods beginning after December 15, 2016. Among other things, ASU 2016-09 provides for (i) the simplification of accounting presentation of excess tax benefits and tax deficiencies, (ii) an accounting policy election regarding forfeitures to use an estimate or account for when incurred, and (iii) simplification of cash flow presentation for statutory tax rate withholding. The adoption of ASU 2016-09, which resulted in the recognition of excess tax benefits through the condensed consolidated statement of operations and an accounting policy election made by the Company to eliminate the use of a forfeiture estimate and recognize forfeitures as they occur, resulted in the recognition of a c umulative effect adjustment with a $1.6 million impact to accumulated deficit and a $1.9 million total impact to stockholders’ equity and deferred income taxes. There was no material impact on the Company’s condensed consolidated statement of cash flows, the condensed consolidated statement of operations, or net loss or earnings (loss) per share. The adoption of the accounting policy election to record forfeitures as incurred and the recognition of excess tax benefits in the condensed consolidated statement of operations may increase the volatility of net income (loss). Revenue Recognition The Company recognizes revenue when persuasive evidence of an arrangement exists, services are rendered or products are delivered, installed and functional, as applicable, the price to the buyer is fixed or determinable and collectability is reasonably assured. Certain services of the Company require payment in advance of service performance. In such cases, the Company records a service liability at the time of billing and subsequently recognizes revenue ratably over the service period. The Company bills customers certain transactional taxes on service revenues. These transactional taxes are not included in reported revenues as they are recognized as liabilities at the time customers are billed. The Company earns revenue by providing services through access to and usage of its networks. Local service revenues are recognized as services are provided. Carrier data revenues are earned by providing switched access and other switched and dedicated services to other carriers. Cash Equivalents and Marketable Securities The Company considers its investment in all highly liquid debt instruments with an original maturity of three months or less, when purchased, to be cash equivalents. The Company’s marketable securities at March 31, 2017 and December 31, 2016 consist of debt securities not classified as cash equivalents. The Company classifies such debt securities as either held-to-maturity, when the Company has the positive intent and ability to hold the securities to maturity, or available-for-sale. Held-to-maturity debt securities are carried at amortized cost, adjusted for the amortization of premiums or accretion of discounts. Available-for-sale securities are carried at fair value, with unrealized gains and losses reported in other comprehensive income or loss, net of tax. All of the Company’s debt securities not classified as cash equivalents were classified as available-for-sale securities as of March 31, 2017 and December 31, 2016 . Trade Accounts Receivable The Company sells its services to other communication carriers and to business and residential customers primarily in Virginia and West Virginia and portions of other states in the Mid-Atlantic region of the United States. The Company has credit and collection policies to maximize collection of trade receivables and requires advance payment for certain services. The Company estimates an allowance for doubtful accounts based on a review of specific customers with large receivable balances and for the remaining customer receivables the Company uses historical results, current and expected trends and changes in credit policies. Management believes the allowance adequately covers all anticipated losses with respect to trade receivables. Actual credit losses could differ from such estimates. The Company includes bad debt expense in selling, general and administrative in the condensed consolidated statements of operations. Bad debt expense for each of the three months ended March 31, 2017 and 2016 was $0. 1 million . The Company’s allowance for doubtful accounts and customer credits was $0.9 million as of both March 31, 2017 and December 31, 2016 . The following table presents a roll-forward of the Company’s allowance for doubtful accounts and customer credits from December 31, 2016 to March 31, 2017 :   Additions  (In thousands) December 31, 2016 Charged to Expense Charged to Other Accounts Deductions March 31, 2017  Allowance for doubtful accounts and customer credits $ 942 $ 107 $ 72 $ (193) $ 928  Property, Plant and Equipment and Other Long-Lived Assets (Excluding Goodwill and Indefinite-Lived Intangible Assets) Property, plant and equipment, finite-lived intangible assets and long-term deferred charges are recorded at cost and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount should be evaluated pursuant to the subsequent measurement guidance described in FASB Accounting Standards Codification (“ASC”) 360-10-35. Impairment is determined by comparing the carrying value of these long-lived assets to management’s best estimate of future undiscounted cash flows expected to result from the use of the assets. If the carrying value exceeds the estimated undiscounted cash flows, the excess of the asset’s carrying value over the estimated fair value is recorded as an impairment charge. The Company believes that no impairment indicators exist as of March 31, 2017 that would require the Company to perform impairment testing for long-lived assets, including property, plant and equipment, long-term deferred charges and finite-lived intangible assets to be held and used. Depreciation of property, plant and equipment is calculated on a straight-line basis over the estimated useful lives of the assets, which the Company reviews and updates based on historical experiences and future expectations. Plant and equipment held under capital leases are amortized on a straight-line basis over the shorter of the lease term or estimated useful life of the asset. Amortization of assets held under capital leases, including an indefeasible right of use agreement, is included with depreciation expense. Intangibles with a finite life are classified as other intangibles on the condensed consolidated balance sheets. At March 31, 2017 and December 31, 2016 , other intangibles were comprised of the following:   March 31, 2017 December 31, 2016  (Dollars in thousands) Estimated Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization  Customer relationships 6 to 15 yrs $ 115,808 $ (96,488) $ 103,108 $ (95,463)  Trademarks and franchise rights 4 to 15 yrs 3,262 (2,069) 2,862 (2,004)  Non-compete Agreements 2 to 3 yrs 30 (3) - -  Total $ 119,100 $ (98,560) $ 105,970 $ (97,467)  Included in the above amounts are indefinite-lived intangible assets of $0.3 million, which are not subject to amortization. The Company amortizes its finite-lived intangible assets using the straight-line method unless it determines that another systematic method is more appropriate. The Company generally amortizes certain customer relationship intangibles and some acquired trademarks using an accelerated amortization method based on the pattern of estimated earnings from these assets. The estimated life of amortizable intangible assets is determined from the unique factors specific to each asset, and the Company periodically reviews and updates estimated lives based on current events and future expectations. The Company capitalizes costs incurred to renew or extend the term of a recognized intangible asset and amortizes such costs over the remaining life of the asset. No such costs were incurred during the three months ended March 31, 2017 . Amortization expense for the three months ended March 31, 2017 and 2016 was $ 1.1 million and $ 0. 6 million, respectively. Amortization expense for the remainder of 2017 and for the next five years is expected to be as follows:    (In thousands) Customer Relationships Trademarks and Franchise Rights Non-compete Agreements Total  Remainder of 2017 $ 3,460 $ 205 $ 9 $ 3,674  2018 3,727 270 12 4,009  2019 3,443 247 6 3,696  2020 2,922 115 - 3,037  2021 2,531 25 - 2,556  2022 1,195 - - 1,195  Goodwill and Indefinite-Lived Intangible Assets Goodwill and certain trademarks are considered to be indefinite-lived intangible assets. Indefinite-lived intangible assets are not subject to amortization but are instead tested for impairment annually or more frequently if an event indicates that the asset might be impaired. The Company’s policy is to assess the recoverability of indefinite-lived intangible assets annually on October 1 and whenever adverse events or changes in circumstances indicate that impairment may have occurred. The Company believes there have been no events or circumstances to cause it to evaluate the carrying amount of goodwill or indefinite-lived intangible assets during the three months ended March 31, 2017 .  Pension Benefits and Retirement Benefits Other Than Pensions The Company sponsors a non-contributory defined benefit pension plan (the “Pension Plan”) covering all employees who meet eligibility requirements and were employed prior to October 1, 2003. The Company froze the Pension Plan effective December 31, 2012. As such, no further benefits are being accrued by participants for services rendered beyond that date. For the three months ended March 31, 2017 and 2016 , the components of the Company’s net periodic benefit (income) cost for the Pension Plan were as follows:    Three Months Ended March 31,  (In thousands) 2017 2016  Service cost $ - $ -  Interest cost 648 674  Expected return on plan assets (912) (884)  Amortization of loss 236 262  Net periodic benefit (income) cost $ (28) $ 52  Pension Plan assets were valued at $56.4 million and $55.6 million at March 31, 2017 and December 31, 2016 , respectively. No funding contributions were made during the three months ended March 31, 2017 , and the Company does not expect to make a funding contribution during the remainder of 2017. The Company also provides life insurance benefits for retired employees who meet eligibility requirements through two postretirement welfare benefit plans (the “Other Postretirement Benefit Plans”). The Company had provided retiree medical benefits under these plans until those benefits were terminated effective December 31, 201 4. The Company did not incur any significant costs associated with these plans during the three months ended March 31, 2017 or 2016. The Company recognized expense for certain nonqualified pension plans for each of the three months ended March 31, 2017 and 2016 of $0.1 million , and less than $0.1 million of this expense for each of these periods relates to the amortization of actuarial loss. The gross amount reclassified out of accumulated other comprehensive loss related to amortization of actuarial losses for retirement plans for each of the three months ended March 31, 2017 and 2016 was $ 0 .3 million, all of which has been reclassified to selling, general and administrative on the condensed consolidated statements of operations. Income taxes associated with these reclassifications were $0.1 million for each of the three months ended March 31, 2017 and 2016. Equity-based Compensation The Company accounts for share-based employee compensation plans under FASB ASC 718, Stock Compensation . Equity-based compensation expense from share-based equity awards is recorded with an offsetting increase to additional paid-in capital on the condensed consolidated balance sheets. For equity awards with only service conditions, the Company recognizes compensation cost on a straight-line basis over the requisite service period for the entire award. Total equity-based compensation expense related to all of the share-based awards, annual employee bonuses paid in the form of immediately vested shares and the Company’s 401(k) matching contributions was $ 6.8 million and $ 5.5 million for the three months ended March 31, 2017 and 2016 , respectively, which amounts are included in selling, general and administrative expenses on the condensed consolidated statements of operations. Future charges for equity-based compensation related to instruments outstanding at March 31, 2017 are estimated to be $3.4 million for the remainder of 2017, $ 2.1 million in 2018, $ 0.7 million in 2019 and less than $ 0.1 million in 2020 and thereafter. Fair Value Measurements Fair value is defined as the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value or for certain financial instruments for which disclosure of fair value is required, the Company uses fair value techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. However, in situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects the Company’s own judgments about the assumptions that market participants would use in pricing the asset or liability. Those judgments are developed by the Company based on the best information available in the circumstances, including expected cash flows and appropriately risk-adjusted discount rates, available observable and unobservable inputs. GAAP establishes a fair value hierarchy with three levels of inputs that may be used to measure fair value: · Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities. · Level 2 – Unadjusted quoted prices for similar assets or liabilities in active markets, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs other than quoted prices that are observable for the asset or liability. · Level 3 – Unobservable inputs for the asset or liability. Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date, which defers the effective date of ASU 2014-09 for public business entities from annual reporting periods beginning after December 15, 2016, to annual reporting periods beginning after December 15, 2017. Early application is permitted only as of annual reporting periods beginning after December 15, 2016. ASU 2014-09 permits the use of either the retrospective or cumulative effect transition method. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606) – Principal versus Agent Considerations (Reporting Gross versus Net) (“ASU 2016-08”), which clarifies implementation guidance on principal versus agent considerations. In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606) – Identifying Performance Obligations and Licensing (“ASU 2016-10”), which clarifies guidance related to identifying performance obligations and licensing implementation guidance contained in ASU 2014-09. In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606) – Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”), which addresses narrow-scope improvements to the guidance on collectability, noncash consideration, and completed contracts at transition. Additionally, the amendments in ASU 2016-12 provide a practical expedient for contract modifications at transition and an accounting policy election related to the presentation of sales taxes and other similar taxes collected from customers. Finally, in December 2016, the FASB issued ASU 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with customers, which makes minor corrections or improvements to ASU 2014-09. In 2016, the Company identified a project team and commenced an initial impact assessment process for ASU 2014-09. To date, the Company has reviewed a sample of contracts with its customers and made preliminary assessments of the impact on revenue and expenses based on these reviews; however, the assessment of the impact to the Company’s results of operations, financial position and cash flows as a result of this guidance is ongoing. Additionally, ASU 2014-09 requires increased disclosure, which in turn may require changes to processes and systems. The Company expects to complete its impact assessment in the second quarter of 2017, at which time it will develop an implementation plan to include any potential process or system changes. The Company will adopt this new standard as of January 1, 2018 and currently expects to apply the modified retrospective method, which may result in a cumulative effect adjustment as of the date of adoption. Both the Company’s initial assessment and its selected transition method may change depending on the results of the Company’s final assessment of the impact to its financial statements.  In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU 2016-01”). The standard addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU 2016-01 is effective for public business entities for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is not permitted. The Company does not expect the future adoption of ASU 2016-01 to have a material impact on its consolidated financial statements and disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”), which will replace most existing lease guidance in U.S. GAAP when it becomes effective. ASU 2016-02 requires an entity to recognize most leases, including operating leases, on the consolidated balance sheets of the lessee. ASU 2016-02 is effective for public business entities for annual reporting periods beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 requires the use of a modified retrospective transition method with elective reliefs. The Company is still evaluating the effect that ASU 2016-02 will have on its consolidated financial statements and disclosures. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) (“ASU 2016-15”), which addresses eight classification issues related to the statement of cash flows presentation, with the objective of reducing diversity in practice. The amendments in this ASU provide guidance on the following cash flow issues: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investees; 7) beneficial interests in securitization transactions; and 8) separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for public business entities for annual reporting periods beginning after December 31, 2017, with early adoption permitted. Although the Company is still evaluating the effect that ASU 2016-15 will have on its statement of cash flow and disclosures, the Company expects the standard will primarily impact the presentation of the earnouts associated with the business acquisitions completed in January 2017. Their presentation in accordance with ASU 2016-15 would depend on whether they were deemed to be paid soon after the acquisition. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which simplifies the accounting for goodwill impairment by eliminating Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Under 2017-04, goodwill will be measured using the difference between the fair value and carrying value of the reporting unit. ASU 2017-04 is effective for public business entities for annual and interim reporting periods beginning after December 31, 2019, with early adoption permitted for goodwill impairment tests with measurement dates after January 1, 2017. The Company does not expect the future adoption of ASU 2017-04 to have a material impact on its consolidated financial statements and disclosures.

EQT Merger

EQT Merger	3 Months Ended
	Mar. 31, 2017
Business Combinations [Abstract]
EQT Merger	Note 3. EQT Merger On February 18, 2017, the Company entered into the Merger Agreement by and among the Company, Parent and Merger Sub, pursuant to which the Company will be acquired by EQT Infrastructure. Upon the terms and subject to the conditions of the Merger Agreement, Merger Sub will merge with and into the Company, with the Company continuing as the surviving corporation and a wholly owned subsidiary of the Parent. As a result of the Merger, Lumos Networks will cease to be a publicly traded company, and the directors of Merger Sub will continue as the directors of the surviving corporation.  At the effective time of the EQT Merger, each outstanding share of the Company’s common stock will be converted automatically into the right to receive $18.00 in cash, which amount the Company refers to as the “Merger Consideration,” without interest and less any applicable withholding taxes.  The completion of the EQT Merger, which is expected to close in the third quarter of 2017, is subject to the satisfaction or waiver of certain conditions, including (i) the adoption of the Merger Agreement by the affirmative vote of the holders of a majority of the outstanding shares of common stock of the Company, (ii) the approval of the transaction by the Federal Communications Commission (the “FCC”), (iii) the filing of a voluntary notice with CFIUS and investigative procedures as deemed necessary by the agency, (iv) the provision of all required notices to applicable state public utility commissions and approval in return as required, (v) the expiration of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (“HSR Act”), as amended, (vi) the absence of any proceeding, order or law enjoining or prohibiting the EQT Merger or the other transactions contemplated by the Merger Agreement, (vii) each party’s material performance of its obligations and compliance with its covenants, (viii) the accuracy of each party’s representations and warranties, subject to customary materiality qualifiers, and (ix) the absence of a material adverse effect on the Company. The HSR Act waiting period expired on April 3, 2017. The consummation of the EQT Merger is not subject to a financing condition, although the funding of the equity financing and the debt financing is subject to the satisfaction of the conditions set forth in the applicable commitment letter under which such financing will be provided. Under the Merger Agreement, if t he Merger Agreement is terminated by the Company under specific circumstances, the Company may be required to pay Parent a termination fee of approximately $16.1 million and if the Merger Agreement is terminated by Parent under specific circumstances, the Parent may be required to pay a termination fee of approximately $32.1 million to the Company.  During the three months ended March 31, 2017 , the Company incurred $2.8 million in acquisition and merger related charges associated with the EQT Merger, which consist primarily of professional fees incurred from legal and investment banking services, which are included in selling, general and administrative expenses in the condensed consolidated statement of operations.

Business Acquisitions

Business Acquisitions	3 Months Ended
	Mar. 31, 2017
Business Combination, Separately Recognized Transactions [Abstract]
Business Acquisitions	Note 4. Business Acquisitions On January 4, 2017 , the Company acquired 100% of the membership interests in Clarity Communications, LLC, (“Clarity”), a North Carolina based fiber bandwidth provider, for a total purchase price of up to approximately $15 million, approximately $10 million of which was paid in cash upon closing with the remaining $5 million subject to certain earnout provisions over a two year period following the closing date, which would be accelerated upon a change in control . The earnout provisions are based upon achievement of certain monthly recurring revenue targets within the two year measurement period and are presented within other long-term liabilities in the Company’s condensed consolidated balance sheets. Clarity operates a 730 mile fiber network with 75 on-net locations, a majority of which are located in North Carolina, with additional operations in South Carolina, Alabama, Tennessee, and Georgia. The acquisition of Clarity was funded using cash on hand and was considered an asset purchase for tax purposes.  On January 31, 2017 , the Company acquired 100% of the membership interests in DC74 LLC, (“DC74”), a Charlotte, North Carolina based data center and managed services provider, for a total purchase price of up to $29.5 million, consisting of approximately $23.5 million paid in cash upon closing and up to $6 million subject to certain earnout provisions over a 12-month period following the closing date, which would vest upon a change in control. The earnout provisions are based upon achievement of certain monthly recurring revenue targets within the one year measurement period and are presented within other accrued liabilities in the Company’s condensed consolidated balance sheets. DC74 provides co-location, bandwidth and cross-connect services in addition to managed services and managed hosting at its three data centers. The acquisition of DC74 was funded using cash on hand and was considered an asset purchase for tax purposes.  The Company has accounted for the acquisitions of Clarity and DC74 under the acquisition method of accounting, in accordance with FASB ASC 805, Business Combinations, and will account for any measurement period adjustments under ASU 2015-16, Simplifying the Accounting for Measurement Period Adjustments. Under the acquisition method of accounting, the total purchase price is allocated to the tangible and intangible assets acquired and liabilities assumed in connection with the acquisitions based on their estimated fair values. In the first quarter of 2017, the Company initially recognized the assets acquired and liabilities assumed from the aforementioned acquisitions based on preliminary estimates of their acquisition date fair values. As additional information regarding the acquired assets and assumed liabilities becomes known, management may make adjustments to the opening balance sheets of the acquired companies up to the end of the measurement period, which is no longer than a one-year period following the acquisition date. The determination of the fair values of the acquired assets and assumed liabilities (and the related determination of estimated lives of depreciable tangible and identifiable intangible assets) requires significant judgment. As of March 31, 2017, the Company had not completed its fair value analyses and calculations in sufficient detail necessary to arrive at the final estimates of the fair value of certain working capital and non-working capital acquired assets and assumed liabilities, including, but not limited to, the allocations to goodwill and intangible assets, tangible fixed assets and contingent consideration obligations related to its acquisitions of Clarity and DC74. All information presented with respect to working capital and non-working capital acquired assets and assumed liabilities as it relates to these acquisitions is preliminary and subject to revision pending the completion of the fair value analyses. The preliminary fair values of the assets acquired and liabilities assumed were determined using the income, cost, and market approaches. The cost and market approaches were used in combination to determine the fair value of the real and personal property and derivations of the income approach were predominantly used in valuing the intangible assets and contingent consideration obligations associated with the earnout provisions. The following table summarizes the Company's preliminary estimates of the acquisition date fair values of the assets acquired and liabilities assumed from its Clarity and DC74 acquisitions:    (In thousands) Clarity Communications, LLC January 4, 2017 DC74, LLC January 31, 2017  Assets acquired  Cash $ 625 $ 493  Other Current Assets 1,318 380  Property, Plant and Equipment 2,819 1,684  Goodwill 6,723 18,616  Intangible assets subject to amortization  Customer relationship intangible 4,300 8,400  Trademark intangible 200 200  Non-compete agreement intangible 20 10  Total intangible assets subject to amortization 4,520 8,610  Other Assets 34 47  Total assets acquired 16,039 29,830  Liabilities assumed  Current liabilities 853 404  Long-term liabilities - 495  Total liabilities assumed 853 899  Net assets acquired 15,186 28,931  Less cash acquired (625) (493)  Net consideration paid 14,561 28,438  Less contingent consideration obligations (4,600) (4,900)  Net cash consideration paid at closing $ 9,961 $ 23,538  The preliminary goodwill resulting from these acquisitions in the amount of $6.7 million from Clarity and $18.6 million from DC74 are the result of the added network diversity, access to new markets and prospective data customers, operational synergies and the assembled workforce. Substantially all of the goodwill is expected to be deductible for tax purposes in future periods. For segment reporting purposes, all of this goodwill was allocated to the Data operating segment. A roll-forward of the preliminary segmented goodwill from December 31, 2016 to March 31, 2017 is as follows:    (In thousands) December 31, 2016 Acquisition Additions March 31, 2017  Data $ 90,561 $ 25,339 $ 115,900  R&SB 9,736 - 9,736  RLEC Access - - -  Total goodwill $ 100,297 $ 25,339 $ 125,636  The amounts of Clarity revenue and net income included in the Company’s condensed consolidated statement of operations for the period January 4, 2017 through March 31, 2017 are $1.6 million and $0.1 million, respectively. The amounts of DC74 revenue and net income included in the Company’s condensed consolidated statement of operations for the period January 31, 2017 through March 31, 2017 are $1.1 million and less than $0.1 million, respectively. The pro forma results of the combined operations of the Company and Clarity and DC74 are not materially different from the Company’s presented statement of operations for the three months ended March 31, 2017 and 2016.  In connection with the acquisitions of Clarity and DC74, the Company incurred certain professional fees (i.e., legal, accounting, regulatory, etc.), which have been included in selling, general and administrative expenses in the condensed consolidated statements of operations and in cash flows from operating activities in the condensed consolidated statement of cash flows. The Company incurred transaction costs of less than $0.1 million and $0.1 million during the three months ended March 31, 2017 in connection with the Clarity and DC74 acquisitions, respectively.

Cash Equivalents And Marketable

Cash Equivalents And Marketable Securities	3 Months Ended
	Mar. 31, 2017
Cash Equivalents And Marketable Securities [Abstract]
Cash Equivalents And Marketable Securities	Note 5. Cash Equivalents and Marketable Securities The Company’s cash equivalents and available-for-sale marketable securities reported at fair value as of March 31, 2017 and December 31, 2016 are summarized below:     (In thousands) March 31, 2017 December 31, 2016  Cash equivalents:  Money market mutual funds $ 37 $ 6,742  Commercial paper 4,349 -  Corporate debt securities 1,082 413  Total cash equivalents 5,468 7,155  Marketable securities:  Variable rate demand notes 5,000 13,995  Commercial paper 2,885 7,370  Corporate debt securities 6,974 16,716  Total marketable securities, available-for-sale 14,859 38,081   Total cash equivalents and marketable securities $ 20,327 $ 45,236  At March 31, 2017 and December 31, 2016 , the carrying values of the investments included in cash and cash equivalents approximated fair value. The aggregate amortized cost of the available-for-sale securities was not materially different from the aggregate fair value. The contractual maturities of the Company’s available-for-sale debt securities were as follows as of March 31, 2017 :    (In thousands) Total  Due in one year or less $ 9,859  Due after one year through five years -  Due after five years through ten years 2,000  Due after ten years 3,000  Total debt securities $ 14,859  The Company received total proceeds of $27.2 million and $43.1 million from the sale or maturity of available-for-sale marketable securities during the three months ended March 31, 2017 and 2016 , respectively . The Company did not recognize any material realized net gains or losses and net unrealized holding gains or losses on available-for-sale marketable securities were less than $0.1 million for each of the three months ended March 31, 2017 and 2016 . Unrealized holding gains or losses are included in accumulated other comprehensive loss on the condensed consolidated balance sheets.

Disclosures About Segments Of A

Disclosures About Segments Of An Enterprise And Related Information	3 Months Ended
	Mar. 31, 2017
Disclosures About Segments Of An Enterprise And Related Information [Abstract]
Disclosures About Segments Of An Enterprise And Related Information	Note 6. Disclosures About Segments of an Enterprise and Related Information The Company’s operating segments generally align with its major product and service offerings and coincide with the way that the Company’s chief operating decision makers measure performance and allocate resources. The Company’s chief operating decision makers are its Chief Executive Officer and its Chief Financial Officer (collectively, the “CODMs”). The Company’s current reportable operating segments are data, residential and small business (“R&SB”) and RLEC access. A general description of the products and services offered and the customers served by each of these segments is as follows: · Data: This segment includes the Company’s enterprise data (metro Ethernet, dedicated Internet, voice over IP (“VoIP”), data center and private line), transport, and FTTC product and service groups. These businesses primarily serve enterprise and carrier customers utilizing the Company’s network of long-haul fiber, metro Ethernet and Ethernet rings located primarily in Virginia and West Virginia, and portions of other states in the Mid-Atlantic region of the United States. · R&SB: This segment includes the following voice products: local lines, primary rate interface (“PRI”), long distance, toll and directory advertising and other voice services (excluding VoIP which are typically provided to enterprise customers and are included in the Company’s data segment) and the following IP services products: fiber-to-the-premise broadband XL, DSL, integrated access and video. These products are sold to residential and small business customers on the Company’s network and within the Company’s footprint. This segment also provides carrier customers access to the Company’s network located in competitive markets. · RLEC Access: This segment provides carrier customers access to the Company’s network within the Company’s RLEC footprint and primarily includes switched access services.  Summarized financial information concerning the Company’s reportable segments is presented in the following table:    (In thousands) Data R&SB RLEC Access Corporate (Unallocated) Total  For the three months ended March 31, 2017:  Operating revenues $ 34,587 $ 15,205 $ 5,124 $ - $ 54,916  Cost of revenue 5,449 4,970 - - 10,419  Gross profit 29,138 10,235 5,124 - N/A  Direct operating and selling costs 2,170 1,107 154 - 3,431  Indirect operating costs 8,022 2,396 52 - 10,470  Corporate general and administrative costs 4,639 1,611 455 10,062 16,767  Adjusted EBITDA (1) 14,307 5,121 4,463 - N/A  Capital expenditures 10,909 2,247 - (59) 13,097     (In thousands) Data R&SB RLEC Access Corporate (Unallocated) Total  For the three months ended March 31, 2016:  Operating revenues $ 29,629 $ 15,828 $ 5,337 $ - $ 50,794  Cost of revenue 4,568 5,644 - - 10,212  Gross profit 25,061 10,184 5,337 - N/A  Direct operating and selling costs 1,671 1,042 145 - 2,858  Indirect operating costs 6,169 2,373 55 - 8,597  Corporate general and administrative costs 3,907 1,620 485 5,868 11,880  Adjusted EBITDA (1) 13,314 5,149 4,652 - N/A  Capital expenditures 21,390 2,222 - (1,606) 22,006   (1) Adjusted EBITDA is used by the Company’s CODMs to evaluate performance. Adjusted EBITDA, as defined by the Company, is net income or loss attributable to Lumos Networks Corp. before interest, income taxes, depreciation and amortization, accretion of asset retirement obligations, net income attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, restructuring charges, acquisition and merger related charges and changes in the fair value of contingent consideration obligations . N/A – Not Applicable (as totals are not presented in the condensed consolidated statements of operations)  The Company’s CODMs do not currently review total assets by segment since the assets are centrally managed and some of the assets are shared by the segments. However, total assets may be allocated to the segments in the future should the CODMs decide to manage the business in that manner. Management does review capital expenditures using success-based metrics that allow the Company to determine which segment product groups are driving investment in the network. Depreciation and amortization expense and certain corporate expenses that are excluded from the measurement of segment profit or loss are not allocated to the operating segments.  The following table provides a reconciliation of the total of the Company’s reportable segments measure of profit to the Company’s consolidated loss before income taxes for the three months ended March 31, 2017 and 2016 :      Three Months Ended March 31,  (In thousands) 2017 2016  Data Adjusted EBITDA $ 14,307 $ 13,314  R&SB Adjusted EBITDA 5,121 5,149  RLEC Access Adjusted EBITDA 4,463 4,652  Total reportable segments measure of profit 23,891 23,115  Interest expense (7,393) (6,989)  Other income, net 623 174  Depreciation and amortization and accretion of asset retirement obligations (15,017) (11,925)  Amortization of actuarial losses (326) (338)  Equity-based compensation (6,794) (5,530)  Restructuring charges - (2,207)  Changes in fair value of contingent consideration obligations (400) -  Acquisition and merger related charges (2,942) -  Loss before income taxes $ (8,358) $ (3,700)   The Company does not currently have any single customer that individually accounted for more than 10% of the Company’s total operating revenues for the three months ended March 31, 2017 or 2016. The Company’s five largest carrier customers, in the aggregate, accounted for 31% and 32% of the Company’s total operating revenues for the three months ended March 31, 2017 and 2016 , respectively . Revenues from these carrier customers were derived primarily from network access, data transport and FTTC services.

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2017
Long-Term Debt [Abstract]
Long-Term Debt	Note 7. Long-Term Debt As of March 31, 2017 and December 31, 2016 , the Company’s outstanding long-term debt consisted of the following:    March 31, 2017 December 31, 2016  (In thousands) Principal Unamortized Discount and Debt Issuance Costs Principal Unamortized Discount and Debt Issuance Costs  Credit Facility $ 337,128 $ 2,939 $ 340,385 $ 3,283  8% Notes 150,000 25,698 150,000 26,529  Capital lease obligations 7,717 - 7,842 -  Long-term debt 494,845 28,637 498,227 29,812  Less: Current portion of long-term debt 13,525 - 13,530 -  Long-term debt, excluding current portion $ 481,320 $ 28,637 $ 484,697 $ 29,812  Credit Facility On April 30, 2013, Lumos Networks Operating Company, a wholly-owned subsidiary of the Company, entered into a $425 million credit facility (the “Credit Facility”). The Credit Facility consists of a $100 million senior secured five -year term loan (“Term Loan A”), a $275 million senior secured six -year term loan (“Term Loan B”); a $28 million senior secured incremental term loan, which was added through an amendment to the Credit Facility dated January 2, 2015, (“Term Loan C”); and a $50 million senior secured five -year revolving credit facility (the “Revolver”). The proceeds from Term Loan A and Term Loan B were used to retire the prior first lien credit facility outstanding amount of approximately $ 311 million and to pay closing costs and other expenses related to the transaction, with the remaining proceeds available for normal course capital expenditures and working capital purposes. The Company used the net proceeds from Term Loan C to fund new FTTC projects. As of March 31, 2017 , no borrowings were outstanding under the Revolver. On August 6, 2015, the Company prepaid $40.0 million of the outstanding principal of the Credit Facility, which was allocated ratably to Term Loans A, B and C. The Company used proceeds from the issuance of the 8% Notes, discussed below, to fund these prepayments. Pricing of the amended Credit Facility is LIBOR plus 3.00% for the Revolver and Term Loan A and LIBOR plus 3.25% for Term Loan B and C . The Credit Facility does not require a minimum LIBOR rate. Term Loan A matures in 2018 with quarterly payments of 2.50% per annum. Term Loan B matures in 2019 with quarterly payments of 1% per annum. Term Loan C matures in 2019 with quarterly payments of 1% per annum. The Revolver matures in full in 2018. The Credit Facility is secured by a first priority pledge of substantially all property and assets of Lumos Networks Operating Company and all material subsidiaries, as guarantors, excluding the RLECs. The amended Credit Facility includes various restrictions and conditions, including a maximum leverage ratio of 4.50 :1.00 through December 31, 2017, 4.25 :1.00 through December 31, 2018, and 4.00 :1.00 thereafter. The amended Credit Facility also sets a minimum interest rate coverage ratio of 3.25 :1.00. At March 31, 2017 , the Company’s leverage ratio was 3.60 :1.00 and its interest coverage ratio was 7. 31 :1.00. The Company was in compliance with its debt covenants as of March 31, 2017 . The Company’s effective interest rate on its Credit Facility for the three months ended March 31, 2017 was 4.19 %. 8% Notes due 2022 On August 6, 2015, the Company issued $150 million in unsecured promissory notes (the “8% Notes”) to an affiliate of Pamplona Capital Management LLC (“Pamplona”). The net proceeds of the 8% Notes, after a $1.5 million purchasers discount and payment of $ 7.1 million of closing costs, were used to prepay $40.0 million of the Company’s existing Credit Facility with the remainder to be used for general corporate purposes, including to fund future growth opportunities. The 8% Notes bear interest at an annual fixed rate of 8.00% and mature on August 15, 2022. Interest is payable in arrears on a quarterly basis on August 15, November 15, February 15, and May 15 of each year. Interest is payable in cash or, at the election of the Company, through the issuance of additional notes or by adding the amount of the accrued interest to the unpaid principal amount of the 8% Notes outstanding at that time. The 8% Notes were also issued with 5,500,000 warrants for no additional consideration to purchase shares of the Company’s common stock (the “Warrants”). The Company allocated the net proceeds received from the debt issuance to the 8% Notes and the equity-classified Warrants based on the relative fair value of the instruments. As a result, the Company recognized a total discount on the 8% Notes of $24.8 million of which $23.5 million represents the value assigned to the Warrants, and $1.3 million represents the allocated portion of the aforementioned $1.5 million purchasers discount. The discount on the 8% Notes is being amortized to interest expense over the life of the debt using the effective interest method. See Note 12 for additional details regarding the Warrants. In connection with the issuance of the 8% Notes in August 2015 and the Term Loan C financing in January 2015, the Company deferred an additional $ 6.0 million and $0.9 million, respectively, in debt issuance costs. Total unamortized debt issuance costs associated with the 8% Notes and Credit Facility are included in the table above, which amounts are included as a reduction of long-term debt in the condensed consolidated balance sheets in accordance with ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs . These costs are being amortized to interest expense over the life of the debt using the effective interest method. Amortization of debt issuance costs was $ 1.2 million and $1.1 million for the three months ended March 31, 2017 and 2016, respectively. The Company’s effective interest rate on the 8% Notes for the three months ended March 31, 2017 was 12.55%, which represents the contractual rate adjusted for the aforementioned discount and deferred debt issuance costs. CoBank Patronage Credits The Company receives patronage credits from CoBank and certain other of the Farm Credit System lending institutions (collectively referred to as “patronage banks”) which are not reflected in the interest rates above. The patronage banks hold a portion of the credit facility and are cooperative banks that are required to distribute their profits to their members. Patronage credits are calculated based on the patronage banks’ ownership percentage of the credit facility and are received by the Company as either a cash distribution or as equity in the patronage banks. These credits are recorded in the condensed consolidated statements of operations as an offset to interest expense. The Patronage credits were $ 0. 2 million a nd $0.3 million for the three months ended March 31, 2017 and 2016, respectively. The aggregate maturities of Term Loan A, Term Loan B and Term Loan C under the Credit Facility are $ 9.7 million in the remainder of 2017, $ 70.9 million in 2018, $ 256.5 million in 2019 and less than $ 0.1 million in 2020. The Revolver under the Credit Facility, under which no borrowings are outstanding as of March 31, 2017 , matures in full in 2018. The 8% Notes mature for $150.0 million in 2022. Capital lease obligations In addition to the long-term debt discussed above, the Company has capital leases on vehicles with original lease terms of four to five years. The Company also has a fiber indefeasible right of use (“IRU”) classified as a capital lease, which was entered into in January 2016. The IRU network capacity arrangement extends through 2035 with payments due monthly. As of March 31, 2017 , the combined total net present value of the Company’s future minimum lease payments is $ 7.7 million and the principal portion of these capital lease obligations is due as follows: $ 0.3 million in the remainder of 2017, $ 0.5 million in 2018, $ 0.5 million in 2019, $ 0.4 million in 2020, $0.4 million in 2021 and $ 5.6 million thereafter.  The historical cost and accumulated amortization for each of the related assets associated with the capital leases is as follows as of March 31, 2017 :      March 31, 2017  (In thousands) Historical Cost Accumulated Amortization  Vehicles $ 2,657 $ (1,784)  Network capacity IRU 8,871 (555)  Total $ 11,528 $ (2,339) 

Supplementary Disclosures Of Ca

Supplementary Disclosures Of Cash Flow Information	3 Months Ended
	Mar. 31, 2017
Supplementary Disclosures Of Cash Flow Information [Abstract]
Supplementary Disclosures Of Cash Flow Information	Note 8. Supplementary Disclosures of Cash Flow Information The following information is presented as supplementary disclosures for the condensed consolidated statements of cash flows for the three months ended March 31, 2017 and 2016 :     Three Months Ended March 31,  (In thousands) 2017 2016  Cash payments for:  Interest (net of amounts capitalized) $ 5,756 $ 5,109  Income taxes - 114  Supplemental investing and financing activities:  Additions to property, plant and equipment included in accounts payable 1,099 6,328  Obligations incurred under capital leases - 7,936  Cash payments for interest for the three months ended March 31, 2017 and 2016 in the table above are net of $0.7 million and $0.8 million, respectively, of cash received from CoBank for patronage credits (Note 7). The amount of interest capitalized was $0.1 million and $0. 4 million for the three months ended March 31, 2017 and 2016 , respectively.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	3 Months Ended
	Mar. 31, 2017
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	Note 9. Fair Value of Financial Instruments The Company’s financial instruments consist of cash and cash equivalents, marketable securities, accounts receivable, accounts payable, capital lease obligations (including the current portion), accrued liabilities, contingent consideration obligations, the Credit Facility (including the current portion) and the 8% Notes as of March 31, 2017 and December 31, 2016 . The carrying values of cash and cash equivalents, accounts receivable, accounts payable, capital lease obligations and accrued liabilities approximated their fair values at March 31, 2017 and December 31, 2016 . Marketable securities are recorded in the condensed consolidated balance sheets at fair value (see Note 5). The following tables present the placement in the fair value hierarchy of financial assets and liabilities that are measured at fair value on a recurring basis at March 31, 2017 and December 31, 2016 :     Fair Value Measurements at March 31, 2017  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  Financial Assets:  Cash equivalents:  Money market mutual funds $ 37 $ - $ - $ 37  Commercial paper - 4,349 - 4,349  Corporate debt securities - 1,082 - 1,082  Total cash equivalents 37 5,431 - 5,468  Marketable securities:  Commercial paper - 2,885 - 2,885  Corporate debt securities - 6,974 - 6,974  Variable rate demand notes - 5,000 - 5,000  Total marketable securities - 14,859 - 14,859  Total financial assets $ 37 $ 20,290 $ - $ 20,327   Financial Liabilities:  Contingent consideration obligations $ - $ - $ 9,900 $ 9,900  Total financial liabilities $ - $ - $ 9,900 $ 9,900     Fair Value Measurements at December 31, 2016  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  Financial Assets:  Cash equivalents:  Money market mutual funds $ 6,742 $ - $ - $ 6,742  Corporate debt securities - 413 - 413  Total cash equivalents 6,742 413 - 7,155  Marketable securities:  Commercial paper - 7,370 - 7,370  Debt securities issued by U.S. Government agencies - - - -  Corporate debt securities - 16,716 - 16,716  Variable rate demand notes - 13,995 - 13,995  Total marketable securities - 38,081 - 38,081  Total financial assets $ 6,742 $ 38,494 $ - $ 45,236   The fair value of commercial paper, variable rate demand notes and corporate, municipal and U.S. government debt securities are provided by a third-party pricing service and are estimated using pricing models. The underlying inputs to the pricing models are directly observable from active markets. However, the pricing models used do entail a certain amount of subjectivity and therefore differing judgments in how the underlying inputs are modeled could result in different estimates of fair value. As such, the Company classifies these fair value measurements as Level 2 within the fair value hierarchy. Additionally, through the business acquisitions of Clarity and DC74, the Company recognized contingent consideration obligations associated with the earnout provisions contained in the agreements. The fair value of the contingent consideration obligations was estimated using a discounted cash flow analysis that schedules out probability-weighted cash flows and adjusts for other factors such as estimated changes in market conditions and credit risk. The fair values of the contingent consideration obligations as of March 31, 2017 for Clarity and DC74 were $4.8 million and $5.1 million, respectively. The fair value technique applied utilizes certain Level 3 inputs. The following table summarizes the carrying amounts and estimated fair values of the components included in the Company’s long-term debt, including the current portion.    March 31, 2017 December 31, 2016  (In thousands) Carrying Value Fair Value (Level 2) Carrying Value Fair Value (Level 2)  Credit Facility $ 334,189 $ 289,964 $ 337,102 $ 304,571  8% Notes 124,302 134,482 123,471 133,965  Capital Lease Obligations 7,717 7,717 7,842 7,842  The respective fair values of the Credit Facility and the 8% Notes were estimated based on an internal discounted cash flows analysis that schedules out the estimated cash flows for the future debt and interest repayments and applies a discount factor that is adjusted to reflect estimated changes in market conditions and credit factors.  The Company also has certain non-marketable long-term investments for which it is not practicable to estimate fair value with a total carrying value of $1. 5 million as of March 31, 2017 and December 31, 2016 , of which $1.4 million represents the Company’s investment in CoBank for each of the respective periods. This investment is primarily related to patronage distributions of restricted equity and is a required investment related to the portion of the Credit Facility held by CoBank. This investment is carried under the cost method.

Equity

Equity	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Equity	 Note 10. Equity  Below is a summary of the activity and status of equity as of and for the three months ended March 31, 2017 :    (In thousands, except per share amounts) Common Shares Treasury Shares Common Stock Additional Paid-in Capital Treasury Stock Accumulated Deficit Accumulated Other Comprehensive Loss, net of tax Total Lumos Networks Corp. Stockholders' Equity Noncontrolling Interests Total Equity  Balance, December 31, 2016 23,607 2 $ 236 $ 175,008 $ (2) $ (29,064) $ (11,004) $ 135,174 $ 886 $ 136,060  Cumulative effect adjustment  of adoption of ASU 2016-09 - - - 329 - 1,579 - 1,908 - 1,908  Balance, January 1, 2017 23,607 2 236 175,337 (2) (27,485) (11,004) 137,082 886 137,968  Net loss attributable to  Lumos Networks Corp. - - - - - (5,317) - (5,317) - (5,317)  Other comprehensive income,  net of tax - - - - - - 205 205 - 205  Equity-based compensation expense - - - 6,794 - - - 6,794 - 6,794  Restricted shares issued, shares  issued through the employee  stock purchase plan and  401(k) matching contributions  (net of shares reacquired  through restricted stock forfeits\  and settlement of tax withholding  obligations on vesting of shares) 409 (139) 5 102 (2,406) - - (2,299) - (2,299)  Stock option exercises 42 11 - 413 174 - - 587 - 587  Net income attributable to  noncontrolling interests - - - - - - - - 33 33  Balance, March 31, 2017 24,058 (126) $ 241 $ 182,646 $ (2,234) $ (32,802) $ (10,799) $ 137,052 $ 919 $ 137,971  

Earnings (Loss) Per Share

Earnings (Loss) Per Share	3 Months Ended
	Mar. 31, 2017
Earnings (Loss) Per Share [Abstract]
Earnings (Loss) Per Share	Note 11. Earnings (Loss) per Share The Company computes basic earnings (loss) per share by dividing net income (loss) attributable to Lumos Networks Corp. applicable to common shares by the weighted average number of common shares outstanding during the period. The impact on earnings (loss) per share of nonvested restricted shares outstanding that contain a non-forfeitable right to receive dividends on a one-to-one per share ratio to common shares is included in the computation of basic earnings per share pursuant to the two-class method. The Company issues restricted shares from time to time with vesting terms that are based on achievement of certain stock price performance conditions. These nonvested restricted shares are excluded from the computation of basic and diluted weighted average shares until the period in which the applicable performance or market conditions are attained. The Company uses the treasury stock method to determine the number of potentially dilutive common shares from stock options and nonvested restricted shares during the period. The computations of basic and diluted earnings (loss) per share for the three months ended March 31, 2017 and 2016 are detailed in the following table.     Three Months Ended March 31,  (In thousands, except per share amounts) 2017 2016  Numerator:  Net loss attributable to Lumos Networks Corp. $ (5,317) $ (2,894)  Less: net income attributable to Lumos Networks Corp. allocable to participating securities - -  Numerator for basic and diluted loss per common share (5,317) (2,894)   Denominator:  Weighted average basic shares outstanding 23,463 22,850  Less: weighted average participating securities and nonvested performance-based restricted shares (846) (795)  Denominator for basic loss per common share 22,617 22,055  Plus: potentially dilutive restricted shares and stock options - -  Denominator for diluted loss per common share 22,617 22,055   Basic and diluted loss per share $ (0.24) $ (0.13)  For the three months ended March 31, 2017 and 2016 , the denominator for diluted loss per common share is equivalent to the denominator for basic loss per common share because the addition of stock options and unvested restricted stock would be antidilutive for the period. As of March 31, 2017 the denominator for diluted loss per common share excluded 733,412 and 503,012 shares related to stock options and nonvested restricted stock, respectively. As of March 31, 2016 , the denominator for diluted loss per common share excluded 871,370 and 356,217 shares related to stock options and nonvested restricted stock, respectively. T he earnings (loss) per share calculations for the three months ended March 31, 2017 and 2016 also exclude the 5,500,000 outstanding stock warrants described in Note 12 as they would be antidilutive for each period.

Stock Options, Restricted Stock

Stock Options, Restricted Stock and Stock Warrants	3 Months Ended
	Mar. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments And Stock Warrant [Abstract]
Stock Options, Restricted Stock and Stock Warrants	Note 12. Stock Options, Restricted Stock and Stock Warrants Stock Options and Restricted Stock The Company has an Equity and Cash Incentive Plan administered by the Compensation Committee of the Company’s board of directors, which permits the grant of long-term incentives to employees and non-employee directors, including stock options, stock appreciation rights, restricted stock awards, restricted stock units, incentive awards, other stock-based awards and dividend equivalents. As of March 31, 2017 , the maximum number of shares of common stock available for awards under the Equity and Cash Incentive Plan was 5,500,000 and 509,545 securities remained available for issuance under the plan. Upon the exercise of stock options or upon the grant of restricted stock under the Equity and Cash Incentive Plan, new common shares are issued or treasury stock is reissued. The Company issued no stock options and 89,067 shares of restricted stock under the Equity and Cash Incentive Plan during the three months ended March 31, 2017 . Restricted shares generally cliff vest on the third anniversary of the grant date for employees and generally cliff vest on the first anniversary of the grant date for non-employee directors. Some of the outstanding restricted stock awards vest on a graded vesting schedule over a five year period. A summary of the activity for the three months ended March 31, 2017 is as follows:   (In thousands, except per share amounts) Shares Weighted-Average Exercise Price per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value  Stock options outstanding at December 31, 2016 1,749 $ 12.35  Granted during the period - -  Exercised during the period (76) 13.25  Forfeited during the period - -  Expired during the period (5) 11.40  Stock options outstanding at March 31, 2017 1,668 $ 12.31 5.2 years $ 9,191   Stock options exercisable at March 31, 2017 1,291 $ 12.12 4.9 years $ 7,400  Total stock options outstanding, vested and expected to vest at March 31, 2017 1,668 $ 12.31 $ 9,191  The total fair value of options that vested during the three months ended March 31, 2017 was $ 0. 2 million. As of March 31, 2017 , there was $ 0.7 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of 1.3 years.  A summary of the activity and status of the Company’s restricted stock for the three months ended March 31, 2017 , is as follows:    (In thousands, except per share amounts) Shares Weighted-Average Grant Date Fair Value per Share  Restricted stock outstanding at December 31, 2016 849 $ 13.85  Granted during the period 89 16.43  Vested during the period (117) 12.94  Forfeited during the period - -  Restricted stock outstanding at March 31, 2017 821 $ 14.26  As of March 31, 2017 , there was $ 5.5 million of total unrecognized compensation cost related to unvested restricted stock awards, which is expected to be recognized over a weighted-average period of 1.7 years.  Immediately prior to the effective time of the EQT Merger, the Company’s outstanding stock options (whether or not vested and exercisable) will automatically vest and be cancelled and entitle the option holder to receive an amount in cash equal to the product of (i) the total number of shares subject to the option and (ii) the amount, if any, of excess of $18.00 and the applicable exercise price per share underlying the option (less any applicable withholding taxes). Additionally, immediately prior to the effective time of the Merger, the Company’s outstanding restricted stock will automatically vest and the restrictions thereon will lapse and entitle the holder of such share of Company restricted stock to receive $18.00 in cash (less any applicable withholding taxes).  Stock Warrants A summary of the activity and status of the Company’s stock warrants for the three months ended March 31, 2017 , is as follows:   (In thousands, except per share amounts) Shares Weighted Average Exercise Price per Share  Stock warrants outstanding at December 31, 2016 5,500 $ 13.99  Granted during the period - -  Exercised during the period - -  Expired during the period - -  Stock warrants outstanding at March 31, 2017 5,500 $ 13.99  Outstanding warrants consist of those issued on August 6, 2015 in conjunction with the 8% Notes issuance discussed in Note 7 (the “Warrants”). The Warrants are fully vested and exercisable and may be net-share settled on a cashless basis only until they expire on August 6, 2022. A portion of the net proceeds from the 8% Notes issuance was allocated to the equity-classified Warrants based on the relative fair value of the instruments.       Lumos Investment Holdings, Ltd., an affiliate of Pamplona Capital Management, the holder of the Warrants has agreed, subject to the effectiveness of the EQT Merger, to exercise the Warrant. Upon exercise, Pamplona will receiv e 1,225,278 shares of common stock that will be exchanged for $18.00 in cash in the EQT Merger.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2017
Income Taxes [Abstract]
Income Taxes	Note 13. Income Taxes Income tax benefit for the three months ended March 31, 2017 and 2016 was $3.1 million and $0. 9 million, respectively, which represents the federal statutory tax rate applied to pre-tax loss and the effects of state income taxes and certain non-deductible charges for each period. The Company’s recurring non-deductible expenses relate primarily to certain non-cash equity-based compensation and non-deductible interest on the 8% Notes, which are treated as applicable high yield discount obligations (“AHYDO”) within the meaning of Section 163(i)(1) of the Internal Revenue Code, as amended. The Company also incurred certain transaction costs during the three months ended March 31, 2017 that would be considered capitalized costs for income tax purposes, primarily associated with the Merger. While management believes the Company has adequately provided for all significant tax positions, amounts asserted by taxing authorities could be greater than its accrued position. Accordingly, additional provisions could be recorded in the future as revised estimates are made or the underlying matters are settled or otherwise resolved. In general, tax years 2013 and thereafter remain open and subject to federal and state audit examinations.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Note 14. Related Party Transactions ValleyNet, an equity method investee of the Company, resells capacity on the Company’s fiber network under an operating lease agreement. Facility lease revenue from ValleyNet was approximately $1.0 million and $1.2 million for three months ended March 31, 2017 and 2016 , respectively, which is presented in the Company’s data segment revenues. The Company had accounts receivable from ValleyNet of $0. 3 million and $0.4 million at March 31, 2017 and December 31, 2016, respectively. The Company also leases and resells capacity from ValleyNet. The total lease expense was $0.2 million and $0.3 million for the three months ended March 31, 2017 and 2016 , respectively.

Restructuring Charges

Restructuring Charges	3 Months Ended
	Mar. 31, 2017
Restructuring Charges [Abstract]
Restructuring Charges	Note 15. Restructuring Charges In 2016, the Company completed an employee reduction-in-force and restructuring costs, consisting of employee severance and termination benefits, of $1.9 million were recognized during the year ended December 31, 2016. There were no restructuring costs recognized during the three months ended March 31, 2017.  A liability for restructuring charges in the amount of $0.2 million is included in the Company’s condensed consolidated balance sheet as of March 31, 2017 , related to employee termination costs accrued, but not yet paid. Below is a summary of the restructuring liability balance as of March 31, 2017 :     (In thousands) Employee Severance and Termination Benefits Total  Beginning balance at December 31, 2016 $ 398 $ 398  Additions, net of adjustments - -  Payments (212) (212)  Ending balance at March 31, 2017 $ 186 $ 186 

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2017
Commitments And Contingencies [Abstract]
Commitments And Contingencies	Note 16. Commitments and Contingencies Customer Disputes and Routine Matters The Company periodically makes claims or receives disputes and is involved in legal actions related to billings to other carriers for access to the Company’s network. The Company does not recognize revenue related to such matters until collection of the claims is reasonably assured. In addition to this, the Company periodically disputes access charges that are assessed by other companies with which the Company interconnects and is involved in other disputes and legal and tax proceedings and filings arising from normal business activities. The Company is involved in routine litigation and disputes in the ordinary course of its business. While the results of litigation and disputes are inherently unpredictable, management does not expect that the ultimate costs to resolve these matters will have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows, and believes that adequate provision for any probable and estimable losses has been made in the Company’s condensed consolidated financial statements. The Company has purchase commitments relating to capital projects totaling $ 1.1 million as of March 31, 2017 , which are expected to be satisfied during the remainder of 2017.  Litigation Related to the EQT Merger  On April 4, 2017 and April 11, 2017, two putative class action lawsuits were filed in the United States District Court for the District of Delaware against the Company’s directors, EQT Partners Inc., Parent and Merger Sub. The plaintiffs in the actions allege that the Company’s disclosures in its preliminary proxy statement filed by the Company with the SEC on March 31, 2017 contained false and misleading statements and omitted material information and further that the individual defendants are liable for those alleged misstatements and omissions. The actions seek, among other things, to enjoin the Merger or, if the Merger has been consummated, to rescind the Merger or an award of damages, and an award of attorneys’ and experts’ fees and costs. Although it is not possible to predict the outcome of litigation matters with certainty, the Company believes that the claims raised in the actions are without merit and intends to defend against them vigorously.

Summary of Significant Accoun23

Summary of Significant Accounting Policies (Policy)	3 Months Ended
	Mar. 31, 2017
Summary of Significant Accounting Policies [Abstract]
Principles Of Consolidation And Basis Of Presentation	Principles of Consolidation and Basis of Presentation The condensed consolidated financial statements include the accounts of the Company, Lumos Networks Operating Company, a wholly-owned subsidiary of the Company, and all of Lumos Networks Operating Company’s wholly-owned subsidiaries and those limited liability corporations where Lumos Networks Operating Company or certain of its subsidiaries, as managing member, exercise control. All significant intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, the accompanying unaudited condensed consolidated financial statements as of and for the three months ended March 31, 2017 and 2016 contain all adjustments necessary to present fairly in all material respects the Company’s financial position and the results of operations and cash flows for all periods presented on the respective condensed consolidated financial statements included herein. The results of operations for the three months ended March 31, 2017 are not necessarily indicative of the results to be expected for the full year. The accompanying condensed consolidated balance sheet as of December 31, 2016 has been derived from the audited consolidated financial statements included in Part II, Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2016 .
Accounting Estimates	Accounting Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the useful lives of fixed assets, the allowance for doubtful accounts and customer credits, deferred tax assets, asset retirement obligations, stock warrants and equity-based compensation, goodwill impairment assessments, contingent consideration obligations, reserves for employee benefit obligations and income tax uncertainties.
Changes in Accounting Principle	Changes in Accounting Principle In January 2017, the Company adopted the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis (“ASU 2015-02”), which is effective for public companies for fiscal years beginning after September 1, 2016. ASU 2015-02 provides a revised consolidation model for all reporting entities to use in evaluating whether they should consolidate certain legal entities. All legal entities will be subject to reevaluation under this revised consolidation model. The revised consolidation model, among other things, (i) modifies the evaluation of whether limited partnerships and similar legal entities are VIEs, or voting interest entities, (ii) eliminates the presumption that a general partner should consolidate a limited partnership, and (iii) modifies the consolidation analysis of reporting entities that are involved with VIEs through fee arrangements and related party relationships. The Company’s condensed consolidated financial statements as of and for the three months ended March 31, 2017 and 2016 were not impacted by the adoption of ASU 2015-02. Additionally, the Company adopted FASB ASU 2016-09, Compensation – Stock Compensation (Topic 718) (“ASU 2016-09”) in January 2017, which simplifies the accounting for share-based payment transactions and is effective for public companies for annual reporting periods beginning after December 15, 2016. Among other things, ASU 2016-09 provides for (i) the simplification of accounting presentation of excess tax benefits and tax deficiencies, (ii) an accounting policy election regarding forfeitures to use an estimate or account for when incurred, and (iii) simplification of cash flow presentation for statutory tax rate withholding. The adoption of ASU 2016-09, which resulted in the recognition of excess tax benefits through the condensed consolidated statement of operations and an accounting policy election made by the Company to eliminate the use of a forfeiture estimate and recognize forfeitures as they occur, resulted in the recognition of a c umulative effect adjustment with a $1.6 million impact to accumulated deficit and a $1.9 million total impact to stockholders’ equity and deferred income taxes. There was no material impact on the Company’s condensed consolidated statement of cash flows, the condensed consolidated statement of operations, or net loss or earnings (loss) per share. The adoption of the accounting policy election to record forfeitures as incurred and the recognition of excess tax benefits in the condensed consolidated statement of operations may increase the volatility of net income (loss).
Revenue Recognition	Revenue Recognition The Company recognizes revenue when persuasive evidence of an arrangement exists, services are rendered or products are delivered, installed and functional, as applicable, the price to the buyer is fixed or determinable and collectability is reasonably assured. Certain services of the Company require payment in advance of service performance. In such cases, the Company records a service liability at the time of billing and subsequently recognizes revenue ratably over the service period. The Company bills customers certain transactional taxes on service revenues. These transactional taxes are not included in reported revenues as they are recognized as liabilities at the time customers are billed. The Company earns revenue by providing services through access to and usage of its networks. Local service revenues are recognized as services are provided. Carrier data revenues are earned by providing switched access and other switched and dedicated services to other carriers.
Cash Equivalents And Marketable Securities	Cash Equivalents and Marketable Securities The Company considers its investment in all highly liquid debt instruments with an original maturity of three months or less, when purchased, to be cash equivalents. The Company’s marketable securities at March 31, 2017 and December 31, 2016 consist of debt securities not classified as cash equivalents. The Company classifies such debt securities as either held-to-maturity, when the Company has the positive intent and ability to hold the securities to maturity, or available-for-sale. Held-to-maturity debt securities are carried at amortized cost, adjusted for the amortization of premiums or accretion of discounts. Available-for-sale securities are carried at fair value, with unrealized gains and losses reported in other comprehensive income or loss, net of tax. All of the Company’s debt securities not classified as cash equivalents were classified as available-for-sale securities as of March 31, 2017 and December 31, 2016 .
Trade Accounts Receivable	Trade Accounts Receivable The Company sells its services to other communication carriers and to business and residential customers primarily in Virginia and West Virginia and portions of other states in the Mid-Atlantic region of the United States. The Company has credit and collection policies to maximize collection of trade receivables and requires advance payment for certain services. The Company estimates an allowance for doubtful accounts based on a review of specific customers with large receivable balances and for the remaining customer receivables the Company uses historical results, current and expected trends and changes in credit policies. Management believes the allowance adequately covers all anticipated losses with respect to trade receivables. Actual credit losses could differ from such estimates. The Company includes bad debt expense in selling, general and administrative in the condensed consolidated statements of operations. Bad debt expense for each of the three months ended March 31, 2017 and 2016 was $0. 1 million . The Company’s allowance for doubtful accounts and customer credits was $0.9 million as of both March 31, 2017 and December 31, 2016 . The following table presents a roll-forward of the Company’s allowance for doubtful accounts and customer credits from December 31, 2016 to March 31, 2017 :   Additions  (In thousands) December 31, 2016 Charged to Expense Charged to Other Accounts Deductions March 31, 2017  Allowance for doubtful accounts and customer credits $ 942 $ 107 $ 72 $ (193) $ 928 
Property, Plant and Equipment and Other Long-Lived Assets (Excluding Goodwill and Indefinite-Lived Intangible Assets)	Property, Plant and Equipment and Other Long-Lived Assets (Excluding Goodwill and Indefinite-Lived Intangible Assets) Property, plant and equipment, finite-lived intangible assets and long-term deferred charges are recorded at cost and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount should be evaluated pursuant to the subsequent measurement guidance described in FASB Accounting Standards Codification (“ASC”) 360-10-35. Impairment is determined by comparing the carrying value of these long-lived assets to management’s best estimate of future undiscounted cash flows expected to result from the use of the assets. If the carrying value exceeds the estimated undiscounted cash flows, the excess of the asset’s carrying value over the estimated fair value is recorded as an impairment charge. The Company believes that no impairment indicators exist as of March 31, 2017 that would require the Company to perform impairment testing for long-lived assets, including property, plant and equipment, long-term deferred charges and finite-lived intangible assets to be held and used. Depreciation of property, plant and equipment is calculated on a straight-line basis over the estimated useful lives of the assets, which the Company reviews and updates based on historical experiences and future expectations. Plant and equipment held under capital leases are amortized on a straight-line basis over the shorter of the lease term or estimated useful life of the asset. Amortization of assets held under capital leases, including an indefeasible right of use agreement, is included with depreciation expense. Intangibles with a finite life are classified as other intangibles on the condensed consolidated balance sheets. At March 31, 2017 and December 31, 2016 , other intangibles were comprised of the following:   March 31, 2017 December 31, 2016  (Dollars in thousands) Estimated Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization  Customer relationships 6 to 15 yrs $ 115,808 $ (96,488) $ 103,108 $ (95,463)  Trademarks and franchise rights 4 to 15 yrs 3,262 (2,069) 2,862 (2,004)  Non-compete Agreements 2 to 3 yrs 30 (3) - -  Total $ 119,100 $ (98,560) $ 105,970 $ (97,467)  Included in the above amounts are indefinite-lived intangible assets of $0.3 million, which are not subject to amortization. The Company amortizes its finite-lived intangible assets using the straight-line method unless it determines that another systematic method is more appropriate. The Company generally amortizes certain customer relationship intangibles and some acquired trademarks using an accelerated amortization method based on the pattern of estimated earnings from these assets. The estimated life of amortizable intangible assets is determined from the unique factors specific to each asset, and the Company periodically reviews and updates estimated lives based on current events and future expectations. The Company capitalizes costs incurred to renew or extend the term of a recognized intangible asset and amortizes such costs over the remaining life of the asset. No such costs were incurred during the three months ended March 31, 2017 . Amortization expense for the three months ended March 31, 2017 and 2016 was $ 1.1 million and $ 0. 6 million, respectively. Amortization expense for the remainder of 2017 and for the next five years is expected to be as follows:    (In thousands) Customer Relationships Trademarks and Franchise Rights Non-compete Agreements Total  Remainder of 2017 $ 3,460 $ 205 $ 9 $ 3,674  2018 3,727 270 12 4,009  2019 3,443 247 6 3,696  2020 2,922 115 - 3,037  2021 2,531 25 - 2,556  2022 1,195 - - 1,195 
Goodwill and Indefinite-Lived Intangible Assets	Goodwill and Indefinite-Lived Intangible Assets Goodwill and certain trademarks are considered to be indefinite-lived intangible assets. Indefinite-lived intangible assets are not subject to amortization but are instead tested for impairment annually or more frequently if an event indicates that the asset might be impaired. The Company’s policy is to assess the recoverability of indefinite-lived intangible assets annually on October 1 and whenever adverse events or changes in circumstances indicate that impairment may have occurred. The Company believes there have been no events or circumstances to cause it to evaluate the carrying amount of goodwill or indefinite-lived intangible assets during the three months ended March 31, 2017 .
Pension Benefits and Retirement Benefits Other Than Pensions	Pension Benefits and Retirement Benefits Other Than Pensions The Company sponsors a non-contributory defined benefit pension plan (the “Pension Plan”) covering all employees who meet eligibility requirements and were employed prior to October 1, 2003. The Company froze the Pension Plan effective December 31, 2012. As such, no further benefits are being accrued by participants for services rendered beyond that date. For the three months ended March 31, 2017 and 2016 , the components of the Company’s net periodic benefit (income) cost for the Pension Plan were as follows:    Three Months Ended March 31,  (In thousands) 2017 2016  Service cost $ - $ -  Interest cost 648 674  Expected return on plan assets (912) (884)  Amortization of loss 236 262  Net periodic benefit (income) cost $ (28) $ 52  Pension Plan assets were valued at $56.4 million and $55.6 million at March 31, 2017 and December 31, 2016 , respectively. No funding contributions were made during the three months ended March 31, 2017 , and the Company does not expect to make a funding contribution during the remainder of 2017. The Company also provides life insurance benefits for retired employees who meet eligibility requirements through two postretirement welfare benefit plans (the “Other Postretirement Benefit Plans”). The Company had provided retiree medical benefits under these plans until those benefits were terminated effective December 31, 201 4. The Company did not incur any significant costs associated with these plans during the three months ended March 31, 2017 or 2016. The Company recognized expense for certain nonqualified pension plans for each of the three months ended March 31, 2017 and 2016 of $0.1 million , and less than $0.1 million of this expense for each of these periods relates to the amortization of actuarial loss. The gross amount reclassified out of accumulated other comprehensive loss related to amortization of actuarial losses for retirement plans for each of the three months ended March 31, 2017 and 2016 was $ 0 .3 million, all of which has been reclassified to selling, general and administrative on the condensed consolidated statements of operations. Income taxes associated with these reclassifications were $0.1 million for each of the three months ended March 31, 2017 and 2016.
Equity-based Compensation	Equity-based Compensation The Company accounts for share-based employee compensation plans under FASB ASC 718, Stock Compensation . Equity-based compensation expense from share-based equity awards is recorded with an offsetting increase to additional paid-in capital on the condensed consolidated balance sheets. For equity awards with only service conditions, the Company recognizes compensation cost on a straight-line basis over the requisite service period for the entire award. Total equity-based compensation expense related to all of the share-based awards, annual employee bonuses paid in the form of immediately vested shares and the Company’s 401(k) matching contributions was $ 6.8 million and $ 5.5 million for the three months ended March 31, 2017 and 2016 , respectively, which amounts are included in selling, general and administrative expenses on the condensed consolidated statements of operations. Future charges for equity-based compensation related to instruments outstanding at March 31, 2017 are estimated to be $3.4 million for the remainder of 2017, $ 2.1 million in 2018, $ 0.7 million in 2019 and less than $ 0.1 million in 2020 and thereafter.
Fair Value Measurements	Fair Value Measurements Fair value is defined as the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required to be recorded at fair value or for certain financial instruments for which disclosure of fair value is required, the Company uses fair value techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. However, in situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects the Company’s own judgments about the assumptions that market participants would use in pricing the asset or liability. Those judgments are developed by the Company based on the best information available in the circumstances, including expected cash flows and appropriately risk-adjusted discount rates, available observable and unobservable inputs. GAAP establishes a fair value hierarchy with three levels of inputs that may be used to measure fair value: · Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities. · Level 2 – Unadjusted quoted prices for similar assets or liabilities in active markets, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs other than quoted prices that are observable for the asset or liability. Level 3 – Unobservable inputs for the asset or liability.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date, which defers the effective date of ASU 2014-09 for public business entities from annual reporting periods beginning after December 15, 2016, to annual reporting periods beginning after December 15, 2017. Early application is permitted only as of annual reporting periods beginning after December 15, 2016. ASU 2014-09 permits the use of either the retrospective or cumulative effect transition method. In March 2016, the FASB issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606) – Principal versus Agent Considerations (Reporting Gross versus Net) (“ASU 2016-08”), which clarifies implementation guidance on principal versus agent considerations. In April 2016, the FASB issued ASU 2016-10, Revenue from Contracts with Customers (Topic 606) – Identifying Performance Obligations and Licensing (“ASU 2016-10”), which clarifies guidance related to identifying performance obligations and licensing implementation guidance contained in ASU 2014-09. In May 2016, the FASB issued ASU 2016-12, Revenue from Contracts with Customers (Topic 606) – Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”), which addresses narrow-scope improvements to the guidance on collectability, noncash consideration, and completed contracts at transition. Additionally, the amendments in ASU 2016-12 provide a practical expedient for contract modifications at transition and an accounting policy election related to the presentation of sales taxes and other similar taxes collected from customers. Finally, in December 2016, the FASB issued ASU 2016-20, Technical Corrections and Improvements to Topic 606, Revenue from Contracts with customers, which makes minor corrections or improvements to ASU 2014-09. In 2016, the Company identified a project team and commenced an initial impact assessment process for ASU 2014-09. To date, the Company has reviewed a sample of contracts with its customers and made preliminary assessments of the impact on revenue and expenses based on these reviews; however, the assessment of the impact to the Company’s results of operations, financial position and cash flows as a result of this guidance is ongoing. Additionally, ASU 2014-09 requires increased disclosure, which in turn may require changes to processes and systems. The Company expects to complete its impact assessment in the second quarter of 2017, at which time it will develop an implementation plan to include any potential process or system changes. The Company will adopt this new standard as of January 1, 2018 and currently expects to apply the modified retrospective method, which may result in a cumulative effect adjustment as of the date of adoption. Both the Company’s initial assessment and its selected transition method may change depending on the results of the Company’s final assessment of the impact to its financial statements.  In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities (“ASU 2016-01”). The standard addresses certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU 2016-01 is effective for public business entities for fiscal years, and interim periods within those years, beginning after December 15, 2017, and early adoption is not permitted. The Company does not expect the future adoption of ASU 2016-01 to have a material impact on its consolidated financial statements and disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) (“ASU 2016-02”), which will replace most existing lease guidance in U.S. GAAP when it becomes effective. ASU 2016-02 requires an entity to recognize most leases, including operating leases, on the consolidated balance sheets of the lessee. ASU 2016-02 is effective for public business entities for annual reporting periods beginning after December 15, 2018, with early adoption permitted. ASU 2016-02 requires the use of a modified retrospective transition method with elective reliefs. The Company is still evaluating the effect that ASU 2016-02 will have on its consolidated financial statements and disclosures. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) (“ASU 2016-15”), which addresses eight classification issues related to the statement of cash flows presentation, with the objective of reducing diversity in practice. The amendments in this ASU provide guidance on the following cash flow issues: 1) debt prepayment or debt extinguishment costs; 2) settlement of zero-coupon debt instruments; 3) contingent consideration payments made after a business combination; 4) proceeds from the settlement of insurance claims; 5) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; 6) distributions received from equity method investees; 7) beneficial interests in securitization transactions; and 8) separately identifiable cash flows and application of the predominance principle. ASU 2016-15 is effective for public business entities for annual reporting periods beginning after December 31, 2017, with early adoption permitted. Although the Company is still evaluating the effect that ASU 2016-15 will have on its statement of cash flow and disclosures, the Company expects the standard will primarily impact the presentation of the earnouts associated with the business acquisitions completed in January 2017. Their presentation in accordance with ASU 2016-15 would depend on whether they were deemed to be paid soon after the acquisition. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which simplifies the accounting for goodwill impairment by eliminating Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Under 2017-04, goodwill will be measured using the difference between the fair value and carrying value of the reporting unit. ASU 2017-04 is effective for public business entities for annual and interim reporting periods beginning after December 31, 2019, with early adoption permitted for goodwill impairment tests with measurement dates after January 1, 2017. The Company does not expect the future adoption of ASU 2017-04 to have a material impact on its consolidated financial statements and disclosures.

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2017
Summary of Significant Accounting Policies [Abstract]
Schedule of Allowance for Doubtful Accounts	  Additions  (In thousands) December 31, 2016 Charged to Expense Charged to Other Accounts Deductions March 31, 2017  Allowance for doubtful accounts and customer credits $ 942 $ 107 $ 72 $ (193) $ 928 
Finite-Lived Intangibles Assets	  March 31, 2017 December 31, 2016  (Dollars in thousands) Estimated Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization  Customer relationships 6 to 15 yrs $ 115,808 $ (96,488) $ 103,108 $ (95,463)  Trademarks and franchise rights 4 to 15 yrs 3,262 (2,069) 2,862 (2,004)  Non-compete Agreements 2 to 3 yrs 30 (3) - -  Total $ 119,100 $ (98,560) $ 105,970 $ (97,467) 
Schedule Of Future Amortization Expense	  (In thousands) Customer Relationships Trademarks and Franchise Rights Non-compete Agreements Total  Remainder of 2017 $ 3,460 $ 205 $ 9 $ 3,674  2018 3,727 270 12 4,009  2019 3,443 247 6 3,696  2020 2,922 115 - 3,037  2021 2,531 25 - 2,556  2022 1,195 - - 1,195 
Schedule of Net Benefit Cost (Income)	  Three Months Ended March 31,  (In thousands) 2017 2016  Service cost $ - $ -  Interest cost 648 674  Expected return on plan assets (912) (884)  Amortization of loss 236 262  Net periodic benefit (income) cost $ (28) $ 52 

Business Acquisitions (Tables)

Business Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2017
Business Combination, Separately Recognized Transactions [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	  (In thousands) Clarity Communications, LLC January 4, 2017 DC74, LLC January 31, 2017  Assets acquired  Cash $ 625 $ 493  Other Current Assets 1,318 380  Property, Plant and Equipment 2,819 1,684  Goodwill 6,723 18,616  Intangible assets subject to amortization  Customer relationship intangible 4,300 8,400  Trademark intangible 200 200  Non-compete agreement intangible 20 10  Total intangible assets subject to amortization 4,520 8,610  Other Assets 34 47  Total assets acquired 16,039 29,830  Liabilities assumed  Current liabilities 853 404  Long-term liabilities - 495  Total liabilities assumed 853 899  Net assets acquired 15,186 28,931  Less cash acquired (625) (493)  Net consideration paid 14,561 28,438  Less contingent consideration obligations (4,600) (4,900)  Net cash consideration paid at closing $ 9,961 $ 23,538 
Schedule of Goodwill	  (In thousands) December 31, 2016 Acquisition Additions March 31, 2017  Data $ 90,561 $ 25,339 $ 115,900  R&SB 9,736 - 9,736  RLEC Access - - -  Total goodwill $ 100,297 $ 25,339 $ 125,636 

Cash Equivalents And Marketab26

Cash Equivalents And Marketable Securities (Tables)	3 Months Ended
	Mar. 31, 2017
Cash Equivalents And Marketable Securities [Abstract]
Schedule Of Cash Equivalents And Available-For-Sale Securities Reported At Fair Value	  (In thousands) March 31, 2017 December 31, 2016  Cash equivalents:  Money market mutual funds $ 37 $ 6,742  Commercial paper 4,349 -  Corporate debt securities 1,082 413  Total cash equivalents 5,468 7,155  Marketable securities:  Variable rate demand notes 5,000 13,995  Commercial paper 2,885 7,370  Corporate debt securities 6,974 16,716  Total marketable securities, available-for-sale 14,859 38,081   Total cash equivalents and marketable securities $ 20,327 $ 45,236 
Schedule Of Contractual Maturities Of Available-For-Sale Debt Securities	  (In thousands) Total  Due in one year or less $ 9,859  Due after one year through five years -  Due after five years through ten years 2,000  Due after ten years 3,000  Total debt securities $ 14,859 

Disclosures About Segments of27

Disclosures About Segments of an Enterprise and Related Information (Tables)	3 Months Ended
	Mar. 31, 2017
Disclosures About Segments Of An Enterprise And Related Information [Abstract]
Summarized Financial Information Of Reportable Segments	  (In thousands) Data R&SB RLEC Access Corporate (Unallocated) Total  For the three months ended March 31, 2017:  Operating revenues $ 34,587 $ 15,205 $ 5,124 $ - $ 54,916  Cost of revenue 5,449 4,970 - - 10,419  Gross profit 29,138 10,235 5,124 - N/A  Direct operating and selling costs 2,170 1,107 154 - 3,431  Indirect operating costs 8,022 2,396 52 - 10,470  Corporate general and administrative costs 4,639 1,611 455 10,062 16,767  Adjusted EBITDA (1) 14,307 5,121 4,463 - N/A  Capital expenditures 10,909 2,247 - (59) 13,097     (In thousands) Data R&SB RLEC Access Corporate (Unallocated) Total  For the three months ended March 31, 2016:  Operating revenues $ 29,629 $ 15,828 $ 5,337 $ - $ 50,794  Cost of revenue 4,568 5,644 - - 10,212  Gross profit 25,061 10,184 5,337 - N/A  Direct operating and selling costs 1,671 1,042 145 - 2,858  Indirect operating costs 6,169 2,373 55 - 8,597  Corporate general and administrative costs 3,907 1,620 485 5,868 11,880  Adjusted EBITDA (1) 13,314 5,149 4,652 - N/A  Capital expenditures 21,390 2,222 - (1,606) 22,006   (1) Adjusted EBITDA is used by the Company’s CODMs to evaluate performance. Adjusted EBITDA, as defined by the Company, is net income or loss attributable to Lumos Networks Corp. before interest, income taxes, depreciation and amortization, accretion of asset retirement obligations, net income attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, restructuring charges, acquisition and merger related charges and changes in the fair value of contingent consideration obligations . N/A – Not Applicable (as totals are not presented in the condensed consolidated statements of operations)
Reconciliation of Total of Reportable Segments Measure of Profit to Consolidated Income (Loss) Before Income Taxes	  Three Months Ended March 31,  (In thousands) 2017 2016  Data Adjusted EBITDA $ 14,307 $ 13,314  R&SB Adjusted EBITDA 5,121 5,149  RLEC Access Adjusted EBITDA 4,463 4,652  Total reportable segments measure of profit 23,891 23,115  Interest expense (7,393) (6,989)  Other income, net 623 174  Depreciation and amortization and accretion of asset retirement obligations (15,017) (11,925)  Amortization of actuarial losses (326) (338)  Equity-based compensation (6,794) (5,530)  Restructuring charges - (2,207)  Changes in fair value of contingent consideration obligations (400) -  Acquisition and merger related charges (2,942) -  Loss before income taxes $ (8,358) $ (3,700) 

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2017
Long-Term Debt [Abstract]
Schedule Of Long-Term Debt	  March 31, 2017 December 31, 2016  (In thousands) Principal Unamortized Discount and Debt Issuance Costs Principal Unamortized Discount and Debt Issuance Costs  Credit Facility $ 337,128 $ 2,939 $ 340,385 $ 3,283  8% Notes 150,000 25,698 150,000 26,529  Capital lease obligations 7,717 - 7,842 -  Long-term debt 494,845 28,637 498,227 29,812  Less: Current portion of long-term debt 13,525 - 13,530 -  Long-term debt, excluding current portion $ 481,320 $ 28,637 $ 484,697 $ 29,812 
Schedule of Capital Leased Assets	  March 31, 2017  (In thousands) Historical Cost Accumulated Amortization  Vehicles $ 2,657 $ (1,784)  Network capacity IRU 8,871 (555)  Total $ 11,528 $ (2,339) 

Supplementary Disclosures Of 29

Supplementary Disclosures Of Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2017
Supplementary Disclosures Of Cash Flow Information [Abstract]
Supplementary Disclosures of Cash Flow Information	  Three Months Ended March 31,  (In thousands) 2017 2016  Cash payments for:  Interest (net of amounts capitalized) $ 5,756 $ 5,109  Income taxes - 114  Supplemental investing and financing activities:  Additions to property, plant and equipment included in accounts payable 1,099 6,328  Obligations incurred under capital leases - 7,936 

Fair Value Of Financial Instr30

Fair Value Of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Of Financial Instruments [Abstract]
Summary Of Financial Assets and Liabilities Measured At Fair Value	 Fair Value Measurements at March 31, 2017  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  Financial Assets:  Cash equivalents:  Money market mutual funds $ 37 $ - $ - $ 37  Commercial paper - 4,349 - 4,349  Corporate debt securities - 1,082 - 1,082  Total cash equivalents 37 5,431 - 5,468  Marketable securities:  Commercial paper - 2,885 - 2,885  Corporate debt securities - 6,974 - 6,974  Variable rate demand notes - 5,000 - 5,000  Total marketable securities - 14,859 - 14,859  Total financial assets $ 37 $ 20,290 $ - $ 20,327   Financial Liabilities:  Contingent consideration obligations $ - $ - $ 9,900 $ 9,900  Total financial liabilities $ - $ - $ 9,900 $ 9,900     Fair Value Measurements at December 31, 2016  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  Financial Assets:  Cash equivalents:  Money market mutual funds $ 6,742 $ - $ - $ 6,742  Corporate debt securities - 413 - 413  Total cash equivalents 6,742 413 - 7,155  Marketable securities:  Commercial paper - 7,370 - 7,370  Debt securities issued by U.S. Government agencies - - - -  Corporate debt securities - 16,716 - 16,716  Variable rate demand notes - 13,995 - 13,995  Total marketable securities - 38,081 - 38,081  Total financial assets $ 6,742 $ 38,494 $ - $ 45,236 
Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt	  March 31, 2017 December 31, 2016  (In thousands) Carrying Value Fair Value (Level 2) Carrying Value Fair Value (Level 2)  Credit Facility $ 334,189 $ 289,964 $ 337,102 $ 304,571  8% Notes 124,302 134,482 123,471 133,965  Capital Lease Obligations 7,717 7,717 7,842 7,842 

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Summary Of Activity And Status Of Equity	   (In thousands, except per share amounts) Common Shares Treasury Shares Common Stock Additional Paid-in Capital Treasury Stock Accumulated Deficit Accumulated Other Comprehensive Loss, net of tax Total Lumos Networks Corp. Stockholders' Equity Noncontrolling Interests Total Equity  Balance, December 31, 2016 23,607 2 $ 236 $ 175,008 $ (2) $ (29,064) $ (11,004) $ 135,174 $ 886 $ 136,060  Cumulative effect adjustment  of adoption of ASU 2016-09 - - - 329 - 1,579 - 1,908 - 1,908  Balance, January 1, 2017 23,607 2 236 175,337 (2) (27,485) (11,004) 137,082 886 137,968  Net loss attributable to  Lumos Networks Corp. - - - - - (5,317) - (5,317) - (5,317)  Other comprehensive income,  net of tax - - - - - - 205 205 - 205  Equity-based compensation expense - - - 6,794 - - - 6,794 - 6,794  Restricted shares issued, shares  issued through the employee  stock purchase plan and  401(k) matching contributions  (net of shares reacquired  through restricted stock forfeits\  and settlement of tax withholding  obligations on vesting of shares) 409 (139) 5 102 (2,406) - - (2,299) - (2,299)  Stock option exercises 42 11 - 413 174 - - 587 - 587  Net income attributable to  noncontrolling interests - - - - - - - - 33 33  Balance, March 31, 2017 24,058 (126) $ 241 $ 182,646 $ (2,234) $ (32,802) $ (10,799) $ 137,052 $ 919 $ 137,971 

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 2017
Earnings (Loss) Per Share [Abstract]
Schedule Of Computation Of Basic And Diluted Earnings (Loss) Per Share	  Three Months Ended March 31,  (In thousands, except per share amounts) 2017 2016  Numerator:  Net loss attributable to Lumos Networks Corp. $ (5,317) $ (2,894)  Less: net income attributable to Lumos Networks Corp. allocable to participating securities - -  Numerator for basic and diluted loss per common share (5,317) (2,894)   Denominator:  Weighted average basic shares outstanding 23,463 22,850  Less: weighted average participating securities and nonvested performance-based restricted shares (846) (795)  Denominator for basic loss per common share 22,617 22,055  Plus: potentially dilutive restricted shares and stock options - -  Denominator for diluted loss per common share 22,617 22,055   Basic and diluted loss per share $ (0.24) $ (0.13)  

Stock Options, Restricted Sto33

Stock Options, Restricted Stock and Stock Warrants (Tables)	3 Months Ended
	Mar. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments And Stock Warrant [Abstract]
Summary Of Stock Options Activity	  (In thousands, except per share amounts) Shares Weighted-Average Exercise Price per Share Weighted-Average Remaining Contractual Term Aggregate Intrinsic Value  Stock options outstanding at December 31, 2016 1,749 $ 12.35  Granted during the period - -  Exercised during the period (76) 13.25  Forfeited during the period - -  Expired during the period (5) 11.40  Stock options outstanding at March 31, 2017 1,668 $ 12.31 5.2 years $ 9,191   Stock options exercisable at March 31, 2017 1,291 $ 12.12 4.9 years $ 7,400  Total stock options outstanding, vested and expected to vest at March 31, 2017 1,668 $ 12.31 $ 9,191 
Summary Of Restricted Stock Awards Activity	  (In thousands, except per share amounts) Shares Weighted-Average Grant Date Fair Value per Share  Restricted stock outstanding at December 31, 2016 849 $ 13.85  Granted during the period 89 16.43  Vested during the period (117) 12.94  Forfeited during the period - -  Restricted stock outstanding at March 31, 2017 821 $ 14.26 
Summary of Warrant Activity	  (In thousands, except per share amounts) Shares Weighted Average Exercise Price per Share  Stock warrants outstanding at December 31, 2016 5,500 $ 13.99  Granted during the period - -  Exercised during the period - -  Expired during the period - -  Stock warrants outstanding at March 31, 2017 5,500 $ 13.99 

Restructuring Charges (Tables)

Restructuring Charges (Tables)	3 Months Ended
	Mar. 31, 2017
Restructuring Charges [Abstract]
Summary Of Restucturing Liability Balance	  (In thousands) Employee Severance and Termination Benefits Total  Beginning balance at December 31, 2016 $ 398 $ 398  Additions, net of adjustments - -  Payments (212) (212)  Ending balance at March 31, 2017 $ 186 $ 186 

Organization (Details)

Organization (Details)	Mar. 31, 2017$ / shares
Organization [Abstract]
Sale of Stock, Price Per Share	$ 18

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 1,908
Bad Debt Expenses	100	$ 100
Accounts receivable, allowance	928		$ 942
Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend	0
Indefinite-Lived Intangible Assets (Excluding Goodwill)	300		300
Amortization	1,093	644
Defined Benefit Plan, Contributions by Employer	0
Defined Benefit Plan, Fair Value of Plan Assets	$ 56,400		$ 55,600
Qualified Nonpension Postretirement Benefit Plans	2
Nonqualified Pension Plans Expense	$ 100	100
Amortization of actuarial losses	(326)	(338)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax	100	100
Equity-based compensation, exclusive of restructuring charges	6,794	5,530
Future Charges For Equity-Based Compensation 2017	3,400
Future Charges For Equity-Based Compensation 2018	2,100
Future Charges For Equity-Based Compensation 2019	700
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost	0	0
Defined Benefit Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost	(28)	52
Maximum [Member]
Amortization Of Unrealized Gain Loss On Nonqualified Pension Plans	100	$ 100
Future Charges For Equity-Based Compensation 2020	$ 100

Summary of Significant Accoun37

Summary of Significant Accounting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Summary of Significant Accounting Policies [Abstract]
Allowance for doubtful accounts and customer credits, beginning	$ 942
Charged to Expense	107
Charged to other Accounts	72
Deductions	(193)
Allowance for doubtful accounts and customer credits, ending	$ 928

Summary of Significant Accoun38

Summary of Significant Accounting Policies (Finite-Lived Intangibles Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (98,560)	$ (97,467)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	115,808	103,108
Accumulated Amortization	(96,488)	(95,463)
Trademarks And Franchise Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	3,262	2,862
Accumulated Amortization	(2,069)	(2,004)
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	30
Accumulated Amortization	(3)
Finite-Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	119,100	105,970
Accumulated Amortization	$ (98,560)	$ (97,467)
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated life	6 years
Minimum [Member] | Trademarks And Franchise Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated life	4 years
Minimum [Member] | Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated life	2 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated life	15 years
Maximum [Member] | Trademarks And Franchise Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated life	15 years
Maximum [Member] | Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated life	3 years

Summary of Significant Accoun39

Summary of Significant Accounting Policies (Schedule Of Future Amortization Expense) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	$ 3,674
2,018	4,009
2,019	3,696
2,020	3,037
2,021	2,556
2,022	1,195
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	3,460
2,018	3,727
2,019	3,443
2,020	2,922
2,021	2,531
2,022	1,195
Trademarks And Franchise Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	205
2,018	270
2,019	247
2,020	115
2,021	25
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	9
2,018	12
2,019	$ 6

Summary Of Significant Accoun40

Summary Of Significant Accounting Policies (Schedule Of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 648	$ 674
Expected return on plan assets	(912)	(884)
Amortization of loss	236	262
Net periodic benefit (income) cost	(28)	52
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income) cost	$ 0	$ 0

EQT Merger (Narrative) (Details

EQT Merger (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)$ / shares
Sale of Stock, Price Per Share | $ / shares	$ 18
Merger Termination Payment	$ 16,100
Due from Acquirer under certain circumstances of merger termination	32,100
Business Combination, Acquisition Related Costs	(2,942)
EQT Infrastructure Investment Strategy [Member]
Business Combination, Acquisition Related Costs	$ 2,800

Business Acquisitions (Narrativ

Business Acquisitions (Narrative) (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 04, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Goodwill			$ 125,636		$ 100,297
Business Acquisition, Goodwill, Expected Tax Deductible Amount			25,339
Revenues			54,916	$ 50,794
Net Income Loss			$ (5,284)	$ (2,839)
Clarity Communications, LLC [Member]
Business Acquisition, Effective Date of Acquisition			Jan. 4, 2017
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Payments to Acquire Businesses, Net of Cash Acquired			$ 9,961
Net consideration paid		$ 14,561
Business Combination, Contingent Consideration Arrangements, Description			subject to certain earnout provisions over a two year period following the closing date, which would be accelerated upon a change in control.  The earnout provisions are based upon achievement of certain monthly recurring revenue targets within the two year measurement period
Goodwill		$ 6,723
Revenues			$ 1,600
Net Income Loss			$ 100
DC74 LLC [Member]
Business Acquisition, Effective Date of Acquisition			Jan. 31, 2017
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Payments to Acquire Businesses, Net of Cash Acquired			$ 23,538
Net consideration paid	$ 28,438
Business Combination, Contingent Consideration Arrangements, Description			subject to certain earnout provisions over a 12-month period following the closing date, which would vest upon a change in control.  The earnout provisions are based upon achievement of certain monthly recurring revenue targets within the one year measurement period
Goodwill	$ 18,616
Revenues			$ 1,100
Net Income Loss			100
Business Acquisition, Transaction Costs			100
Maximum [Member] | Clarity Communications, LLC [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			5,000
Business Acquisition, Transaction Costs			100
Maximum [Member] | DC74 LLC [Member]
Net consideration paid			29,500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			$ 6,000

Business Acquisitions (Schedule

Business Acquisitions (Schedule of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 04, 2017	Mar. 31, 2017	Dec. 31, 2016
Goodwill			$ 125,636	$ 100,297
Less contingent consideration obligations			(9,900)
Clarity Communications, LLC [Member]
Cash		$ 625
Other Current Assets		1,318
Property, Plant and Equipment		2,819
Goodwill		6,723
Intangible assets subject to amortization		4,520
Other Assets		34
Total assets acquired		16,039
Current liabilities		853
Total liabilities assumed		853
Net assets acquired		15,186
Less cash acquired		(625)
Net consideration paid		14,561
Less contingent consideration obligations		(4,600)	(4,800)
Payments for acquisitions, net of cash acquired			9,961
Clarity Communications, LLC [Member] | Customer Relationships [Member]
Intangible assets subject to amortization		4,300
Clarity Communications, LLC [Member] | Trademarks [Member]
Intangible assets subject to amortization		200
Clarity Communications, LLC [Member] | Non-Compete Agreements [Member]
Intangible assets subject to amortization		$ 20
DC74 LLC [Member]
Cash	$ 493
Other Current Assets	380
Property, Plant and Equipment	1,684
Goodwill	18,616
Intangible assets subject to amortization	8,610
Other Assets	47
Total assets acquired	29,830
Current liabilities	404
Long-term liabilities	495
Total liabilities assumed	899
Net assets acquired	28,931
Less cash acquired	(493)
Net consideration paid	28,438
Less contingent consideration obligations	(4,900)		(5,100)
Payments for acquisitions, net of cash acquired			$ 23,538
DC74 LLC [Member] | Customer Relationships [Member]
Intangible assets subject to amortization	8,400
DC74 LLC [Member] | Trademarks [Member]
Intangible assets subject to amortization	200
DC74 LLC [Member] | Non-Compete Agreements [Member]
Intangible assets subject to amortization	$ 10

Business Acquisitions (Rollforw

Business Acquisitions (Rollforward of Goodwill by Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Goodwill, December 31, 2016	$ 100,297
Acquisition Additions	25,339
Goodwill, March 31, 2017	125,636
Data [Member]
Goodwill, December 31, 2016	90,561
Acquisition Additions	25,339
Goodwill, March 31, 2017	115,900
R&SB [Member]
Goodwill, December 31, 2016	9,736
Goodwill, March 31, 2017	$ 9,736

Cash Equivalents And Marketab45

Cash Equivalents And Marketable Securities (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Total proceeds from the sale or maturity of available-for-sale marketable securities	$ 27,233,000	$ 43,125,000
Net realized gains or losses on available-for-sale securities	0	0
Maximum [Member]
Net unrealized holding gains on available-for-sale securities	$ 100,000	$ 100,000

Cash Equivalents And Marketab46

Cash Equivalents And Marketable Securities (Schedule Of Cash Equivalents And Available-For-Sale Marketable Securities Reported At Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	$ 5,468	$ 7,155
Total marketable securities, available-for-sale	14,859	38,081
Total cash equivalents and marketable securities	20,327	45,236
Money Market Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	37	6,742
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	1,082	413
Commercial Paper ST [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	4,349
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale	2,885	7,370
Variable Rate Demand Obligation [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale	5,000	13,995
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale	$ 6,974	$ 16,716

Cash Equivalents And Marketab47

Cash Equivalents And Marketable Securities (Schedule Of Contractual Maturities Of Available-For-Sale Debt Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Cash Equivalents And Marketable Securities [Abstract]
Due in one year or less	$ 9,859
Due after five years through ten years	2,000
Due after ten years	3,000
Total debt securities	$ 14,859	$ 38,081

Disclosures About Segments of48

Disclosures About Segments of an Enterprise and Related Information (Narrative) (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2017USD ($)customer	Mar. 31, 2016USD ($)customer
Segment Reporting Information [Line Items]
Number of customers that individually accounted for approximately 10% of total revenues | customer		0	0
Top Five Customers [Member]
Segment Reporting Information [Line Items]
Percentage to total revenue		31.00%	32.00%
Data [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[1]	$ 14,307	$ 13,314
R&SB [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[1]	5,121	5,149
RLEC Access [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[1]	$ 4,463	$ 4,652
[1]	Adjusted EBITDA is used by the Company's CODMs to evaluate performance. Adjusted EBITDA, as defined by the Company, is net income or loss attributable to Lumos Networks Corp. before interest, income taxes, depreciation and amortization, accretion of asset retirement obligations, net income attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, restructuring charges, acquisition and merger related charges and changes in the fair value of contingent consideration obligations.

Disclosures About Segments of49

Disclosures About Segments of an Enterprise and Related Information (Summarized Financial Information Of Reportable Segments) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Operating Revenues		$ 54,916	$ 50,794
Cost of revenue		10,419	10,212
Gross profit		42,369	40,270
Direct operating and selling costs		3,431	2,858
Indirect operating costs		10,470	8,597
Corporate general and administrative costs		16,767	11,880
Capital expenditures		13,097	22,006
Data [Member]
Segment Reporting Information [Line Items]
Operating Revenues		34,587	29,629
Cost of revenue		5,449	4,568
Gross profit		29,138	25,061
Direct operating and selling costs		2,170	1,671
Indirect operating costs		8,022	6,169
Corporate general and administrative costs		4,639	3,907
Adjusted EBITDA	[1]	14,307	13,314
Capital expenditures		10,909	21,390
R&SB [Member]
Segment Reporting Information [Line Items]
Operating Revenues		15,205	15,828
Cost of revenue		4,970	5,644
Gross profit		10,235	10,184
Direct operating and selling costs		1,107	1,042
Indirect operating costs		2,396	2,373
Corporate general and administrative costs		1,611	1,620
Adjusted EBITDA	[1]	5,121	5,149
Capital expenditures		2,247	2,222
RLEC Access [Member]
Segment Reporting Information [Line Items]
Operating Revenues		5,124	5,337
Gross profit		5,124	5,337
Direct operating and selling costs		154	145
Indirect operating costs		52	55
Corporate general and administrative costs		455	485
Adjusted EBITDA	[1]	4,463	4,652
Corporate (Unallocated) [Member]
Segment Reporting Information [Line Items]
Corporate general and administrative costs		10,062	5,868
Capital expenditures		$ (59)	$ (1,606)
[1]	Adjusted EBITDA is used by the Company's CODMs to evaluate performance. Adjusted EBITDA, as defined by the Company, is net income or loss attributable to Lumos Networks Corp. before interest, income taxes, depreciation and amortization, accretion of asset retirement obligations, net income attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, restructuring charges, acquisition and merger related charges and changes in the fair value of contingent consideration obligations.

Disclosures About Segments of50

Disclosures About Segments of an Enterprise and Related Information (Reconciliation of Reportable Segments Measure of Profit to Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total reportable segments measure of profit		$ 23,891	$ 23,115
Interest expense		(7,393)	(6,989)
Other (income) expenses, net		623	174
Depreciation and amortization and accretion of asset retirement obligations		(15,017)	(11,925)
Amortization of actuarial losses		(326)	(338)
Equity-based compensation, exclusive of restructuring charges		(6,794)	(5,530)
Restructuring charges			(2,207)	$ (1,900)
Change in fair value of contingent consideration obligations		(400)
Acquisition and merger related charges		(2,942)
Loss Before Income Taxes		(8,358)	(3,700)
Data [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[1]	14,307	13,314
R&SB [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[1]	5,121	5,149
RLEC Access [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[1]	$ 4,463	$ 4,652
[1]	Adjusted EBITDA is used by the Company's CODMs to evaluate performance. Adjusted EBITDA, as defined by the Company, is net income or loss attributable to Lumos Networks Corp. before interest, income taxes, depreciation and amortization, accretion of asset retirement obligations, net income attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, restructuring charges, acquisition and merger related charges and changes in the fair value of contingent consideration obligations.

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details)	Aug. 06, 2015USD ($)shares	Jan. 02, 2015USD ($)	Apr. 30, 2013USD ($)	Mar. 31, 2017USD ($)item	Mar. 31, 2016USD ($)
Line of credit borrowing capacity			$ 425,000,000
Term of loan			5 years
Amount outstanding retired			$ 311,000,000
Principal payments on senior secured term loans				$ 3,258,000
Line of credit, interest coverage ratio, minimum | item				3.25
Line of credit, leverage ratio | item				3.60
Line of credit, interest coverage ratio | item				7.31
Granted during the period, shares | shares	5,500,000
Amortization of debt discount and issuance costs				$ 1,175,000	$ 1,099,000
Patronage credits				200,000	$ 300,000
Future minimum lease payments				7,700,000
Future minimum lease payments, remainder of 2017				300,000
Future minimum lease payments, 2018				500,000
Future minimum lease payments, 2019				500,000
Future minimum lease payments, 2020				400,000
Future minimum lease payments, 2021				400,000
Future minimum lease payments, thereafter				$ 5,600,000
January 1, 2017 Through December 31, 2017
Line of credit, leverage ratio, maximum | item				4.50
January 1, 2018 Through December 31, 2018
Line of credit, leverage ratio, maximum | item				4.25
After December 31, 2018
Line of credit, leverage ratio, maximum | item				4
Revolver [Member]
Line of credit current borrowing capacity			50,000,000
Line of Credit Facility, Amount Outstanding				$ 0
Amount outstanding, credit facility				$ 0
Basis spread on variable rate				3.00%
Term Loan A [Member]
Line of credit current borrowing capacity			$ 100,000,000
Term of loan			5 years
Basis spread on variable rate				3.00%
Term Loan A [Member] | After December 31, 2016 [Member]
Quarterly payments per annum				2.50%
Term Loan B [Member]
Line of credit current borrowing capacity			$ 275,000,000
Term of loan			6 years
Basis spread on variable rate				3.25%
Quarterly payments per annum				1.00%
Term Loan A, B And C [Member]
Principal payments on senior secured term loans	$ 40,000,000
Debt Instrument, Interest Rate, Effective Percentage				4.19%
Debt issuance costs		$ 900,000
Maturities of long-term debt, remainder of 2017				$ 9,700,000
Maturities of long-term debt, 2018				70,900,000
Maturities of long-term debt, 2019				256,500,000
Maturities of long-term debt, 2020				$ 100,000
Term Loan C [Member]
Line of credit current borrowing capacity		$ 28,000,000
Basis spread on variable rate				3.25%
Quarterly payments per annum				1.00%
Unsecured Debt [Member]
Debt Instrument, Interest Rate, Effective Percentage				12.55%
Debt Instrument, Face Amount	150,000,000
Payment of financing costs	7,100,000
Debt Instrument, Interest Rate, Stated Percentage				8.00%
Debt Instrument, Unamortized Discount	24,800,000
Proceeds from Issuance of Warrants	23,500,000
Portion of Debt Discount offset from proceeds allocated to warrants	1,300,000
Debt discount, amount offset from proceeds	1,500,000
Debt issuance costs	$ 6,000,000
Maturities of long-term debt, thereafter				$ 150,000,000
Minimum [Member]
Term of capital leases				4 years
Maximum [Member]
Term of capital leases				5 years

Long-Term Debt (Schedule Of Lon

Long-Term Debt (Schedule Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Less: current portion of long term debt	$ 13,525	$ 13,530
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	452,683	454,885
Long-term Debt [Member]
Credit facility	337,128	340,385
8% Notes	150,000	150,000
Capital lease obligations	7,717	7,842
Long-term debt	494,845	498,227
Less: current portion of long term debt	13,525	13,530
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	481,320	484,697
Unamortized Discount and Debt Issuance Costs [Member]
Credit facility	2,939	3,283
8% Notes	25,698	26,529
Long-term debt	28,637	29,812
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	$ 28,637	$ 29,812

Long-Term Debt (Schedule of Cap

Long-Term Debt (Schedule of Capitalized Lease Assets) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Vehicles [Member]
Historical cost	$ 2,657
Accumulated amortization	(1,784)
Network capacity IRU [Member]
Historical cost	8,871
Accumulated amortization	(555)
Assets Held under Capital Leases [Member]
Historical cost	11,528
Accumulated amortization	$ (2,339)

Supplementary Disclosures Of 54

Supplementary Disclosures Of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplementary Disclosures Of Cash Flow Information [Abstract]
Interest (net of amounts capitalized)	$ 5,756	$ 5,109
Income taxes		114
Additions to property, plant and equipment included in accounts payable and other accrued liabilities	1,099	6,328
Capital lease obligations		7,936
Cash received from patronage credits	700	800
Interest capitalized	$ 100	$ 400

Fair Value Of Financial Instr55

Fair Value Of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Jan. 31, 2017	Jan. 04, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost Method Investments	$ 1,521			$ 1,479
Contingent consideration obligations	9,900
CoBank [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term investments for which it is not practicable to estimate fair value	1,400			$ 1,400
Clarity Communications, LLC [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration obligations	4,800		$ 4,600
DC74 LLC [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration obligations	$ 5,100	$ 4,900

Fair Value Of Financial Instr56

Fair Value Of Financial Instruments (Summary Of Financial Assets and Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	$ 5,468	$ 7,155
Total marketable securities	14,859	38,081
Total financial assets	20,327	45,236
Contingent consideration obligations	9,900
Total financial liabilities	9,900
Money Market Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	37	6,742
Commercial Paper ST [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	4,349
Variable Rate Demand Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	5,000	13,995
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	2,885	7,370
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	1,082	413
Total marketable securities	6,974	16,716
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	37	6,742
Total financial assets	37	6,742
Level 1 [Member] | Money Market Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	37	6,742
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	5,431	413
Total marketable securities	14,859	38,081
Total financial assets	20,290	38,494
Level 2 [Member] | Commercial Paper ST [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	4,349
Level 2 [Member] | Variable Rate Demand Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	5,000	13,995
Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	2,885	7,370
Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	1,082	413
Total marketable securities	6,974	$ 16,716
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents
Total marketable securities
Total financial assets
Contingent consideration obligations	9,900
Total financial liabilities	9,900
Level 3 [Member] | Money Market Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents
Level 3 [Member] | Commercial Paper ST [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents
Level 3 [Member] | Variable Rate Demand Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities
Level 3 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities
Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents
Total marketable securities

Fair Value Of Financial Instr57

Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Capital lease obligations	$ 7,717	$ 7,842
Fair Value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Capital lease obligations	7,717	7,842
Term Loan A, B And C [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit facility	334,189	337,102
Term Loan A, B And C [Member] | Fair Value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit facility	289,964	304,571
Unsecured Debt [Member] | Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
8% Notes	124,302	123,471
Unsecured Debt [Member] | Fair Value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
8% Notes	$ 134,482	$ 133,965

Equity (Summary Of Activity And

Equity (Summary Of Activity And Status Of Equity) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jan. 01, 2017	Dec. 31, 2016
Stockholders Equity [Line Items]
Balance, December 31, 2016	$ 137,971		$ 137,968	$ 136,060
Cumulative effect adjustment of adoption of ASU 2016-09	1,908
Balance, January 1, 2017	137,971		137,968	136,060
Net Loss Attributable to Lumos Networks Corp.	(5,317)	$ (2,894)
Other comprehensive income (loss), net of tax	205	$ 231
Equity-based compensation expense	6,794
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares)	$ (2,299)
Stock options exercises, shares	76
Stock option exercises	$ 587
Net income attributable to noncontrolling interests	33
Balance	137,971
Common Stock [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	$ 241		236	236
Balance, December 31, 2016, shares	23,607
Balance, January 1, 2017	$ 241		$ 236	$ 236
Balance, Shares	23,607		23,607	23,607
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares)	$ 5
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares), shares	409
Stock options exercises, shares	42
Balance	$ 241
Balance, March 31, 2017, shares	24,058
Treasury Stock [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	$ (2,234)		$ (2)	$ (2)
Balance, December 31, 2016, shares	2
Cumulative effect adjustment of adoption of ASU 2016-09
Balance, January 1, 2017	$ (2,234)		$ (2)	$ (2)
Balance, Shares	2		2	2
Net Loss Attributable to Lumos Networks Corp.
Other comprehensive income (loss), net of tax
Equity-based compensation expense
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares)	$ (2,406)
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares), shares	(139)
Stock options exercises, shares	11
Stock option exercises	$ 174
Net income attributable to noncontrolling interests
Balance	$ (2,234)
Balance, March 31, 2017, shares	(126)
Additional Paid-In Capital [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	$ 182,646		$ 175,337	$ 175,008
Cumulative effect adjustment of adoption of ASU 2016-09	329
Balance, January 1, 2017	182,646		175,337	175,008
Equity-based compensation expense	6,794
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares)	102
Stock option exercises	413
Balance	182,646
Accumulated Deficit [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	(32,802)		(27,485)	(29,064)
Cumulative effect adjustment of adoption of ASU 2016-09	1,579
Balance, January 1, 2017	(32,802)		(27,485)	(29,064)
Net Loss Attributable to Lumos Networks Corp.	(5,317)
Balance	(32,802)
Accumulated Other Comprehensive Loss [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	(10,799)		(11,004)	(11,004)
Balance, January 1, 2017	(10,799)		(11,004)	(11,004)
Other comprehensive income (loss), net of tax	205
Balance	(10,799)
Total Lumos Networks Corp. Stockholders' Equity [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	137,052		137,082	135,174
Cumulative effect adjustment of adoption of ASU 2016-09	1,908
Balance, January 1, 2017	137,052		137,082	135,174
Net Loss Attributable to Lumos Networks Corp.	(5,317)
Other comprehensive income (loss), net of tax	205
Equity-based compensation expense	6,794
Restricted shares issued, shares issued through the employee stock purchase plan and 401(k) matching contributions (net of shares reacquired through restricted stock forfeits and settlement of tax withholding obligations on vesting of shares)	(2,299)
Stock option exercises	587
Balance	137,052
Noncontrolling Interests [Member]
Stockholders Equity [Line Items]
Balance, December 31, 2016	919		886	886
Balance, January 1, 2017	919		$ 886	$ 886
Net income attributable to noncontrolling interests	33
Balance	$ 919

Earnings (Loss) Per Share (Narr

Earnings (Loss) Per Share (Narrative) (Details) - shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded from computation of diluted earnings per common share	733,412	871,370
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded from computation of diluted earnings per common share	503,012	356,217
Warrants and Rights Subject to Mandatory Redemption [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded from computation of diluted earnings per common share	5,500,000	5,500,000

Earnings (Loss) Per Share (Sche

Earnings (Loss) Per Share (Schedule Of Computation Of Basic And Diluted (Loss) Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings (Loss) Per Share [Abstract]
Net loss attributable to Lumos Networks Corp.	$ (5,317)	$ (2,894)
Numerator for basic and diluted loss per common share	$ (5,317)	$ (2,894)
Weighted average basic shares outstanding	23,463	22,850
Less: weighted average participating securities and nonvested performance-based restricted shares	(846)	(795)
Denominator for basic loss per common share	22,617	22,055
Denominator for diluted loss per common share	22,617	22,055
Basic and diluted loss per share	$ (0.24)	$ (0.13)

Stock Options, Restricted Sto61

Stock Options, Restricted Stock and Stock Warrants (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Securities remained available for issuance	509,545
Number of stock options issued	0
Stock plan vesting description	Restricted shares generally cliff vest on the third anniversary of the grant date for employees and generally cliff vest on the first anniversary of the grant date for non-employee directors. Some of the outstanding restricted stock awards vest on a graded vesting schedule over a five year period.
Vesting schedule	5 years
Total fair value of options vested | $	$ 0.2
Sale of Stock, Price Per Share | $ / shares	$ 18
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Number of Shares	1,225,278
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost | $	$ 0.7
Unrecognized compensation cost recognition period, in years	1 year 4 months
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued during the period	89,067
Unrecognized compensation cost | $	$ 5.5
Unrecognized compensation cost recognition period, in years	1 year 8 months 12 days
Equity And Cash Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock available for awards	5,500,000

Stock Options, Restricted Sto62

Stock Options, Restricted Stock and Stock Warrants (Summary Of Stock Options Activity) (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)$ / sharesshares
Stock Plans [Abstract]
Stock options outstanding at December 31, 2016, Shares	1,749,000
Stock options outstanding at December 31, 2016, Weighted-Average Exercise Price per Share | $ / shares	$ 12.35
Granted during the period, Shares	0
Exercised during the period, Shares	(76,000)
Exercised during the period, Weighted-Average Exercise Price per Share | $ / shares	$ 13.25
Forfeited during the period, Shares
Forfeited during the period, Weighted-Average Exercise Price per Share | $ / shares
Expired during the period, Shares	(5,000)
Expired during the period, Weighted-Average Exercise Price per Share | $ / shares	$ 11.40
Stock options outstanding at March 31, 2017, Shares	1,668,000
Stock options outstanding at March 31, 2017, Weighted-Average Exercise Price per Share | $ / shares	$ 12.31
Stock options outstanding at March 31, 2017, Weighted-Average Remaining Contractual Term, in years	5 years 2 months 12 days
Stock options outstanding a March 31, 2017, Aggregate Intrinsic Value | $	$ 9,191
Stock options exercisable at March 31, 2017, Shares	1,291,000
Stock options exercisable at March 31, 2017, Weighted-Average Exercise Price per Share | $ / shares	$ 12.12
Stock options exercisable at March 31, 2017, Weighted-Average Remaining Contractual Term, in years	4 years 10 months 24 days
Stock options exercisable at March 31, 2017, Aggregate Intrinsic Value | $	$ 7,400
Total stock options outstanding, vested and expected to vest at March 31, 2017, Shares	1,668,000
Total stock options outstanding, vested and expected to vest at March 31, 2017, Weighted-Average Exercise Price per Share | $ / shares	$ 12.31
Total stock options outstanding, vested and expected to vest at March 31, 2017, Aggregate Intrinsic Value | $	$ 9,191

Stock Options, Restricted Sto63

Stock Options, Restricted Stock and Stock Warrants (Summary Of Restricted Stock Awards Activity) (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock outstanding at December 31, 2016, Shares | shares	849,000
Stock outstanding at December 31, 2016, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 13.85
Granted during the period, Shares | shares	89,067
Granted during the period, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 16.43
Vested during the period, Shares | shares	(117,000)
Vested during the period, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 12.94
Restricted stock outstanding at March 31, 2017, Shares | shares	821,000
Stock outstanding at March 31, 2017, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 14.26

Stock Options, Restricted Sto64

Stock Options, Restricted Stock and Stock Warrants (Summary of Stock Warrant Activity) (Details) - $ / shares	Aug. 06, 2015	Mar. 31, 2017
Granted during the period, shares	5,500,000
Stock Warrants [Member]
Stock warrants oustanding at December 31, 2016, Shares		5,500,000
Stock warrants outstanding at December 31, 2016, weighted average exercise price per share		$ 13.99
Granted during the period, shares
Exercised during the period, shares
Expired during the period, shares
Granted during the period, weighted average exercise price
Exercised during the period, Weighted Average Exercise Price Per Share
Expired during the period, weighted average exercise price per share
Stock warrants outstanding at March 31, 2017, Shares		5,500,000
Stock warrants outstanding at March 31, 2017, weighted average exercise price		$ 13.99

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Taxes [Abstract]
Income Tax Benefit	$ (3,074)	$ (861)

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) - Equity Method Investee [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0.2	$ 0.3
Related Party Transaction, Other Revenues from Transactions with Related Party	1	$ 1.2
Due from Related Party	$ 0.3		$ 0.4

Restructuring Charges (Narrativ

Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Mar. 31, 2017
Restructuring Charges [Abstract]
Restructuring charges	$ 2,207	$ 1,900
Restructuring Reserve		$ 398	$ 186

Restructuring Charges (Summary

Restructuring Charges (Summary Of Restructuring Liability Balance) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance at December 31, 2016	$ 398
Payments	(212)
Ending balance at March 31, 2017	186
Employee Severance And Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance at December 31, 2016	398
Payments	(212)
Ending balance at March 31, 2017	$ 186

Commitments And Contingencies (

Commitments And Contingencies (Details) $ in Millions	Mar. 31, 2017USD ($)
Commitments And Contingencies [Abstract]
Purchase commitments relating to capital expenditures	$ 1.1