Lumos Networks (LMOS) 10-K 28 Mar 17 2016 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Mar. 15, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
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		23,925,910
Entity Public Float			$ 275,916,131
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 33,575	$ 13,267
Marketable securities	38,081	88,811
Accounts receivable, net of allowance of $942 ($1,235 in 2015)	22,609	20,796
Other receivables	753	852
Income tax receivable	459	568
Prepaid expenses and other	5,028	7,215
Total Current Assets	100,505	131,509
Securities and Investments	1,479	1,180
Property, Plant and Equipment
Land and buildings	24,867	23,019
Network plant and equipment	733,154	624,360
Furniture, fixtures and other equipment	52,030	48,266
Total in service	810,051	695,645
Under construction	22,678	51,663
Property, plant and equipment, gross	832,729	747,308
Less accumulated depreciation and amortization	296,441	248,364
Total Property, Plant and Equipment, net	536,288	498,944
Other Assets
Goodwill	100,297	100,297
Other intangibles, less accumulated amortization of $97,467 ($94,892 in 2015)	8,503	11,078
Deferred charges and other assets	6,300	2,364
Total Other Assets	115,100	113,739
Total Assets	753,372	745,372
Current Liabilities
Current portion of long-term debt	13,530	10,400
Accounts payable	8,607	14,182
Advance billings and customer deposits	14,140	13,849
Accrued compensation	1,491	1,191
Accrued operating taxes	4,518	3,907
Other accrued liabilities	5,000	4,974
Total Current Liabilities	47,286	48,503
Long-term Liabilities
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	454,885	456,300
Retirement benefits	16,029	17,029
Deferred income taxes, net	96,988	89,193
Other long-term liabilities	2,124	1,923
Income tax payable		93
Total Long-term Liabilities	570,026	564,538
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; 23,607 shares issued and 23,605 shares outstanding (23,005 shares issued and 22,992 shares outstanding in 2015)	236	230
Additional paid-in capital	175,008	171,746
Treasury stock, 2 shares at cost (13 shares in 2015)	(2)	(103)
Accumulated deficit	(29,064)	(28,541)
Accumulated other comprehensive loss, net of tax	(11,004)	(11,940)
Total Lumos Networks Corp. Stockholders' Equity	135,174	131,392
Noncontrolling Interests	886	939
Total Equity	136,060	132,331
Total Liabilities and Equity	$ 753,372	$ 745,372

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance	$ 942	$ 1,235
Other intangibles, accumulated amortization	$ 97,467	$ 94,892
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	23,607,000	23,005,000
Common stock, shares outstanding	23,605,000	22,992,000
Treasury stock, shares	2,000	13,000

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements Of Operations [Abstract]
Operating Revenues	$ 206,899	$ 204,269	$ 201,456
Operating Expenses
Cost of Revenue, exclusive of depreciation and amortization shown separately below	38,973	42,205	42,978
Selling, general and administrative, exclusive of depreciation and amortization shown separately below	84,978	77,292	62,672
Depreciation and amortization	51,279	47,527	45,212
Accretion of asset retirement obligations	115	139	118
Restructuring charges	1,940	638
Total Operating Expenses	177,285	167,801	150,980
Operating Income	29,614	36,468	50,476
Other Income (Expenses)
Interest expense	(28,385)	(19,918)	(15,575)
Gain on interest rate swap derivatives		665	492
Other income, net	389	114	664
Total Other Expenses, net	(27,996)	(19,139)	(14,419)
Income Before Income Taxes	1,618	17,329	36,057
Income Tax Expense	1,962	7,146	14,409
Net (Loss) Income	(344)	10,183	21,648
Net Income Attributable to Noncontrolling Interests	(179)	(157)	(120)
Net (Loss) Income Attributable to Lumos Networks Corp.	$ (523)	$ 10,026	$ 21,528
Basic and Diluted (Loss) Earnings per Common Share Attributable to Lumos Networks Corp. Stockholders
Basic (loss) earnings per share	$ (0.02)	$ 0.44	$ 0.97
Diluted (loss) earnings per share	$ (0.02)	$ 0.43	0.95
Cash Dividends Declared per Share - Common Stock			$ 0.56

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements Of Comprehensive Income [Abstract]
Net (Loss) Income	$ (344)	$ 10,183	$ 21,648
Other Comprehensive Income (Loss):
Adjustment to unrecognized loss due to curtailment of postretirement medical plan benefits			1,188
Net unrecognized gain (loss) from defined benefit plans	155	(435)	(15,215)
Reclassification adjustment for amortization of unrealized loss from defined benefit plans included in net (loss) income (see Note 2)	1,350	1,350	248
Unrealized gain (loss) on available-for-sale marketable securities	26	(19)	(23)
Income Taxes	(595)	(350)	5,389
Other Comprehensive Income (Loss), Net of Tax	936	546	(8,413)
Total Comprehensive Income	592	10,729	13,235
Less: Comprehensive Income Attributable to Noncontrolling Interests	(179)	(157)	(120)
Comprehensive Income Attributable to Lumos Networks Corp.	$ 413	$ 10,572	$ 13,115

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities:
Net (Loss) Income	$ (344)	$ 10,183	$ 21,648
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	48,704	42,721	36,025
Amortization	2,575	4,806	9,187
Accretion of asset retirement obligations	115	139	118
Deferred income taxes	1,551	6,767	14,477
Gain on interest rate swap derivatives		(665)	(492)
Equity-based compensation expense	9,818	5,881	4,340
Amortization of debt discount and issuance costs	4,500	2,688	1,461
Curtailment gain			(10,774)
Retirement benefits, net of cash distributions	505	(314)	(1,628)
Excess tax benefits from share-based compensation		(165)
Other	1,566	789	221
Changes in assets and liabilities from operations:
(Increase) decrease in accounts receivable	(2,253)	1,938	845
Increase in other assets	(2,593)	(4,889)	(124)
Changes in income taxes	16	(433)	615
(Decrease) increase in accounts payable	(80)	(923)	3,112
Increase (decrease) in other current liabilities	1,296	(1,778)	778
Net Cash Provided by Operating Activities	65,376	66,745	79,809
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(84,027)	(115,675)	(84,100)
Broadband network expansion funded by stimulus grant		(2,578)	(878)
Purchases of available-for-sale marketable securities	(74,393)	(114,478)	(19,516)
Proceeds from sale or maturity of available-for-sale marketable securities	125,041	42,200	40,679
Change in restricted cash		4,208	116
Cash reimbursement received from broadband stimulus grant		3,838	116
Other			150
Net Cash Used in Investing Activities	(33,379)	(182,485)	(63,433)
Cash Flows from Financing Activities:
Proceeds from issuance of senior secured term loan		28,000
Proceeds from issuance of unsecured notes, net of debt discount		148,500
Payment of financing costs		(8,192)
Principal payments on senior secured term loans	(8,030)	(47,960)	(5,250)
Capital distributions to noncontrolling interests	(232)
Cash dividends paid on common stock		(3,152)	(12,456)
Principal payments under capital lease obligations	(2,683)	(2,471)	(1,468)
Proceeds from stock option exercises and employee stock purchase plan	1,670	356	2,892
Excess tax benefits from share-based compensation		165
Repurchases of common stock to settle tax withholding obligations on employee stock awards	(2,414)	(371)	(66)
Other		(8)	(2)
Net Cash (Used in) Provided by Financing Activities	(11,689)	114,867	(16,350)
Increase (decrease) in cash and cash equivalents	20,308	(873)	26
Cash and Cash Equivalents:
Beginning of Year	13,267	14,140	14,114
End of Year	33,575	13,267	14,140
Data [Member]
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(73,328)	(98,535)	(66,570)
R&SB [Member]
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(10,050)	(9,545)	(7,089)
Corporate (Unallocated) [Member]
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	$ (649)	$ (7,595)	$ (10,441)

Consolidated Statements Of Equi

Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total Lumos Networks Corp. Stockholders' Equity [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2013	$ 222	$ (404)	$ 138,166	$ (47,578)	$ (4,073)	$ 86,333	$ 673	$ 87,006
Balance, shares at Dec. 31, 2013	22,158	49
Net (Loss) Income Attributable to Lumos Networks Corp.				21,528		21,528		21,528
Other comprehensive income (loss), net of tax					(8,413)	(8,413)		(8,413)
Equity-based compensation expense			3,377			3,377		3,377
Adjustments to excess tax benefit from stock-based compensation			(1,488)			(1,488)		(1,488)
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)	$ 4	$ 363	673			1,040		1,040
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	211	(14)
Stock option exercises			2,817			2,817		2,817
Stock option exercises, shares	210
Cash dividends declared ($0.56 per share)				(12,517)		(12,517)		(12,517)
Net income attributable to noncontrolling interests							109	109
Balance at Dec. 31, 2014	$ 226	$ (41)	143,545	(38,567)	(12,486)	92,677	782	93,459
Balance, shares at Dec. 31, 2014	22,579	35
Net (Loss) Income Attributable to Lumos Networks Corp.				10,026		10,026		10,026
Other comprehensive income (loss), net of tax					546	546		546
Equity-based compensation expense			4,721			4,721		4,721
Adjustments to excess tax benefit from stock-based compensation			165			165		165
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)	$ 4	$ (62)	881			823		823
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	399	(22)
Stock warrants issued (net of debt discount and deferred issuance fees)			22,147			22,147		22,147
Stock option exercises			287			287		287
Stock option exercises, shares	27
Net income attributable to noncontrolling interests							157	157
Balance at Dec. 31, 2015	$ 230	$ (103)	171,746	(28,541)	(11,940)	131,392	939	$ 132,331
Balance, shares at Dec. 31, 2015	23,005	13						23,005
Net (Loss) Income Attributable to Lumos Networks Corp.				(523)		(523)		$ (523)
Other comprehensive income (loss), net of tax					936	936		936
Equity-based compensation expense			8,671			8,671		8,671
Adjustments to excess tax benefit from stock-based compensation			(172)			(172)		(172)
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)	$ 6	$ (383)	(841)			(1,218)		(1,218)
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	545	55
Adjustment for deferred taxes upon issuance of 8% Notes			(5,486)			(5,486)		(5,486)
Stock option exercises		$ 484	1,090			1,574		$ 1,574
Stock option exercises, shares	57	(66)						123
Capital distributions to noncontrolling interests							(232)	$ (232)
Net income attributable to noncontrolling interests							179	179
Balance at Dec. 31, 2016	$ 236	$ (2)	$ 175,008	$ (29,064)	$ (11,004)	$ 135,174	$ 886	$ 136,060
Balance, shares at Dec. 31, 2016	23,607	2						23,607

Consolidated Statements Of Equ8

Consolidated Statements Of Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2014$ / shares
Consolidated Statements Of Equity [Abstract]
Cash dividends declared, per share	$ 0.56

Organization

Organization	12 Months Ended
	Dec. 31, 2016
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 located primarily in Virginia and West Virginia, and portions of Maryland, Pennsylvania, 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. On March 17, 2015, in a secondary offering of the Company’s common stock, Quadrangle Capital Partners LP. (“Quadrangle”) sold 1,600,000 shares on an underwritten basis. On September 14, 2015, Quadrangle distributed its remaining 591,898 shares to its investors (the “Distribution”). As a result, the shareholder agreement between Quadrangle and the Company expired as of the effective date of the Distribution. The Company did not receive any proceeds from the offerings, and the Company’s total shares outstanding did not change. All direct costs of these offerings, which were primarily legal, printing and accounting fees related to the preparation of the registration statement, which totaled $0.3 million are included in other expenses in the consolidated statements of operations for the year ended December 31, 2015 . The Company did not incur any direct costs related to offerings during the year s ended December 31, 201 6 or 2014 .

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
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 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, exercised control. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain presentation changes have been made within the operating expense line items on the consolidated statements of operations and prior period amounts have been reclassified in order to conform to the current year presentation. Specifically, the previously reported line item “network access costs” has been removed and the new line item “cost of revenue” has been added along with the necessary operating expense reclassifications. These reclassifications were not the result of an error and have no effect on previously reported operating income, net income or earnings per share.  Accounting Estimates The preparation of 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 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; the valuation of deferred tax assets and/or liabilities, asset retirement obligations and equity-based compensation; goodwill impairment assessments; actuarial determination of employee benefit obligations; stock warrants; and reserve for uncertain income tax positions. 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 investments 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 December 31, 2016 and 2015 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 December 31, 2016 and 2015. 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 Maryland, Pennsylvania, Ohio and Kentucky. 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 expense in the consolidated statements of operations. The following table shows the activity in the allowance for doubtful accounts and customer credits for the years ended December 31, 2016 , 2015 and 2014 :     (In thousands) 2016 2015 2014  Allowance for doubtful accounts and customer credits, beginning $ 1,235 $ 1,217 $ 1,485  Additions:  Charged to expense 236 461 604  (Deducted from) charged to other accounts (97) 96 (19)  Deductions (432) (539) (853)  Allowance for doubtful accounts and customer credits, ending $ 942 $ 1,235 $ 1,217 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 Financial Accounting Standards Board (“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 December 31, 2016 that would require it 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 experience and future expectations. As of December 31, 2016 the estimated lives for each category of property, plant and equipment are as follows:    Estimated Life  Buildings 50 years  Network plant and equipment 3 to 50 years  Furniture, fixtures and other equipment 4 to 24 years  Leasehold improvements, which are categorized in land and buildings, are depreciated over the shorter of the estimated useful lives or the remaining lease terms. 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 (“IRU”), is included with depreciation expense. Intangibles with a finite life are classified as other intangibles on the consolidated balance sheets. At December 31, 2016 and 2015 , other intangibles were comprised of the following:      2016 2015  (Dollars in thousands) Estimated Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization  Customer relationships 6 to 15 yrs $ 103,108 $ (95,463) $ 103,108 $ (93,051)  Trademarks and franchise rights 10 to 15 yrs 2,862 (2,004) 2,862 (1,841)  Total $ 105,970 $ (97,467) $ 105,970 $ (94,892)  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 amortization for certain customer relationship intangibles is being recognized 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 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 years ended December 31, 2016 or 2015 . Amortization expense for the years ended December 31, 2016 , 2015 and 2014 was $ 2.6 million, $ 4.8 million and $ 9.2 million, respectively. Amortization expense for the next five years is expected to be as follows:    (In thousands) Customer Relationships Trademarks and Franchise Rights Total  2017 $ 2,093 $ 163 $ 2,256  2018 1,781 163 1,944  2019 1,513 152 1,665  2020 1,146 48 1,194  2021 1,112 - 1,112  Goodwill and Indefinite-Lived Intangible Assets Goodwill and franchise rights 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 assets annually on October 1 and whenever adverse events or changes in circumstances indicate that impairment may have occurred. The Company first considers whether to take a qualitative approach in determining whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step quantitative goodwill impairment test promulgated by FASB ASC Topic 350. If the Company determines that it is more likely than not that a reporting unit’s fair value is less than its carrying amount or if the Company elects to bypass the qualitative test for a specific period, the two-step process is used to test for goodwill impairment. Step one requires a determination of the fair value of each of the reporting units and, to the extent that the fair value of the reporting unit exceeds its carrying value (including goodwill), the step two calculation of implied fair value of goodwill is not required and no impairment loss is recognized. In testing for goodwill impairment, the Company utilizes a market approach that includes the use of comparable multiples of publicly traded companies whose services are comparable to ours and recent M&A activity. As of December 31, 2016 , goodwill was attributed to the Company’s segments as follows:    (In thousands) December 31, 2016  Data $ 90,561  R&SB 9,736  RLEC Access -  Total goodwill $ 100,297  As of October 1, 2016, the Company performed its annual goodwill impairment test for each of its reporting units with goodwill, which are two of our three operating segments (data and R&SB). After a preliminary assessment, the Company elected to bypass the qualitative assessment and applied step one of the quantitative test as described above. Based on the results of this annual impairment testing, the Company determined that the fair values of each of the data and R&SB reporting units substantially exceed their respective carrying amounts and that no impairment exists. The gross amount of goodwill was $133.7 million and the accumulated impairment loss was $33.4 million for a net carrying amount of $100.3 million as of December 31, 2016 and 2015 . There was no activity in the consolidated goodwill accounts for the years ended 2016 and 2015 .  Accounting for Asset Retirement Obligations An asset retirement obligation is evaluated and recorded as appropriate on assets for which the Company has a legal obligation to retire. The Company records a liability for an asset retirement obligation and the associated asset retirement cost capitalized at the time the underlying asset is acquired. Subsequent to the initial measurement of the asset retirement obligation, the obligation is adjusted at the end of each period to reflect the passage of time and changes in the estimated future cash flows underlying the obligation. The Company enters into various facility collocation agreements and is subject to locality franchise ordinances. The Company constructs assets at these locations and, in accordance with the terms of many of these agreements, the Company is obligated to restore the premises to their original condition at the conclusion of the agreements, generally at the demand of the other party to these agreements. The Company recognizes the fair value of a liability for an asset retirement obligation and capitalizes that cost as part of the cost basis of the related asset, depreciating it over the useful life of the related asset. Included in certain of the franchise ordinances under which the Company’s RLECs and CLECs operate are clauses that require the removal of the RLEC’s and CLEC’s equipment at the termination of the franchise agreement. The Company has not recognized an asset retirement obligation for these liabilities as the removal of the equipment is not estimable due to an indeterminable end date and the fact that the equipment is part of the public switched telephone network and it is not reasonable to assume the jurisdictions would require its removal. The following table indicates the changes to the Company’s asset retirement obligation liability, which is included in other long-term liabilities, for the years ended December 31, 2016 and 2015 :     (In thousands) 2016 2015  Asset retirement obligations, beginning $ 1,720 $ 1,500  Additional asset retirement obligations recorded, net of  adjustments in estimates - 81  Accretion of asset retirement obligations 115 139  Asset retirement obligations, ending $ 1,835 $ 1,720  Advertising Costs The Company expenses advertising costs and marketing production costs as incurred (included within selling, general and administrative expenses in the consolidated statements of operations). Advertising expense for the years ended December 31, 2016 , 2015 and 2014 was $0.9 million, $ 0.7 million and $ 1.4 million, respectively. Pension Benefits and Retirement Benefits Other Than Pensions The Company sponsors a non-contributory defined benefit pension plan (“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. Vested pension benefits were based on years of service and an average of the five highest consecutive years of compensation and are subject to certain reductions if the employee retires and elects to receive the benefit prior to reaching age 65 . The Company has a nonqualified pension plan that was also frozen as of December 31, 2012. Sections 412 and 430 of the Internal Revenue Code and ERISA Sections 302 and 303 establish minimum funding requirements for defined benefit pension plans. The minimum required contribution is generally equal to the target normal cost plus the shortfall amortization installments for the current plan year and each of the six preceding plan years less any calculated credit balance. The Company’s policy is to make contributions to stay at or above the threshold required in order to prevent benefit restrictions and related additional notice requirements and is intended to provide for benefits to be paid in the future. No contributions were made during the year ended December 31, 2016 and the Company does not expect to make a contribution in 2017.  The Company also provides certain postretirement life insurance benefits for retired employees through the qualified nonpension postretirement welfare benefit plan (the “Other Postretirement Benefit Plan”), which is contributory. Eligibility for the life insurance plan is restricted to active pension participants age 50-64 as of January 5, 1994 and is not eligible to employees hired after April 1993. The Company previously provided health care benefits for retired employees, however, the Company terminated those benefits effective December 31, 2014. Eligible retirees received partial compensation for settlement of accrued benefits through a series of supplemental pension payments in 2014. As a result, the Company recognized a curtailment gain of $10.8 million in the year ended December 31, 2014 (see Note 11).  The Company accounts for the pension and postretirement benefits other than pensions by accruing the cost of such benefits over the service periods of employees. Unrecognized actuarial gains and losses are amortized over the estimated average remaining service period for active employees and over the estimated average remaining life for retirees. The Company recognizes in its consolidated balance sheets the amount of the Company’s unfunded Accumulated Postretirement Benefit Obligation (“APBO”) at the end of the year. Amounts recognized in accumulated other comprehensive income (loss) are adjusted out of accumulated other comprehensive income (loss) when they are subsequently recognized as components of net periodic benefit cost (income). The Company sponsors a contributory defined contribution plan under Internal Revenue Code Section 401(k) for substantially all employees. The Company’s policy is to match 100 % of each participant’s annual contributions for contributions up to 1 % of each participant’s annual compensation and 50 % of each participant’s annual contributions up to an additional 5 % of each participant’s annual compensation. Company contributions vest after two years of service. Operating Leases The Company has operating leases for administrative office space and equipment, certain of which have renewal options. These leases, with few exceptions, provide for automatic renewal options and escalations that are either fixed or based on the consumer price index. Any rent abatements, along with rent escalations, are included in the computation of rent expense calculated on a straight-line basis over the lease term. The Company’s minimum lease term for most leases includes the initial non-cancelable term and at least one renewal period to the extent that the exercise of the related renewal option or options is reasonably assured. A renewal option or options is determined to be reasonably assured if failure to renew the leases imposes an in-substance economic penalty on the Company. Leasehold improvements are capitalized and depreciated over the shorter of the assets’ useful life or the lease term, including renewal option periods that are reasonably assured. Income Taxes Deferred income taxes are provided on an asset and liability method whereby deferred tax assets are recognized for deductible temporary differences and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. The Company accrues interest and penalties related to unrecognized tax benefits in interest expense and income tax expense, respectively. For balance sheet presentation purposes, the Company nets its deferred tax asset and deferred tax liability positions by tax jurisdiction and classifies the resulting net deferred tax asset and/or net deferred tax liability as noncurrent in accordance with FASB Accounting Standards Update (“ASU”) 2015-17, Income Taxes (Topic 740) Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). 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 consolidated balance sheet. 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. The fair value of common stock options granted with service-only conditions is estimated at the respective measurement date using the Black-Scholes option-pricing model with assumptions related to risk-free interest rate, expected volatility, dividend yield and expected term. The fair value of restricted stock awards granted with service-only conditions is estimated based on the market value of the common stock on the date of grant reduced by the present value of expected dividends as applicable. Certain stock options and restricted shares granted by the Company in 2012 and 2013 contain vesting provisions that are conditional on achievement of a target market price for the Company’s common stock. The grant date fair value of these options was determined using a Monte Carlo model to reflect the probability of achieving the market condition. The Company initially recognizes the related compensation cost for these awards that contain a market condition on a straight-line basis over the requisite service period as derived from the valuation model. The Company accelerates expense recognition if the market conditions are achieved prior to the end of the derived requisite service period. Total equity-based compensation expense related to all of the share-based awards (Note 9), annual employee bonuses paid in the form of immediately vested shares and the Company’s 401(k) matching contributions, was $9.6 million, $5.9 million and $4.3 million for the years ended December 31, 2016 , 2015 and 2014 , respectively, which amounts are included in selling, general and administrative expenses in the consolidated statements of operations. Future charges for equity-based compensation related to instruments outstanding at December 31, 2016 for the years 2017 through 2019 are estimated to be $ 3.5 million, $ 1.7 million, $ 0.4 million and less than $0.1 million for each of 2020 and 2021, respectively. 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 - Un adjusted 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 (“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. 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 initial 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 expects to 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 February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis (“ASU 2015-02”). 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. ASU 2015-02 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after September 1, 2016. The Company does not expect the future adoption of ASU 2015-02 to have a material impact on its consolidated financial statements and disclosures. 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 sheet 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 March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718) (“ASU 2016-09”), which simplifies the accounting for share-based payment transactions. 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. ASU 2016-09 is effective for public business entities for annual reporting periods beginning after December 15, 2016, with early adoption permitted. The transition method required by ASU 2016-09 varies by amendment. The Company will implement this new standard on its effective date and it does not expect the adoption of 2016-09 to have a material impact on its consolidated financial statements and disclosures. However, the Company cannot provide any assurance regarding their future impacts. Ad ditionally, the ad option of the accounting policy election to record forfeitures as incurred may increase the volatility of equity based compensation. 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 of the presentation of the earnouts associated with the business acquisitions completed in January 2017. Their presentation in ac

Cash Equivalents And Marketable

Cash Equivalents And Marketable Securities	12 Months Ended
	Dec. 31, 2016
Cash Equivalents And Marketable Securities [Abstract]
Cash Equivalents And Marketable Securities	 Note 3. Cash Equivalents and Marketable Securities The Company’s cash equivalents and available-for-sale securities reported at fair value as of December 31, 2016 and 2015 are summarized below:    (In thousands) December 31, 2016 December 31, 2015  Cash equivalents:  Money market mutual funds $ 6,742 $ 6,746  Commercial paper - 1,000  Corporate debt securities 413 1,055  Total cash equivalents 7,155 8,801  Marketable securities:  Commercial paper 7,370 8,684  Debt securities issued by U.S. Government agencies - 35,155  Corporate debt securities 16,716 44,972  Variable rate demand notes 13,995 -  Total marketable securities, available-for-sale 38,081 88,811   Total cash equivalents and marketable securities $ 45,236 $ 97,612 At December 31, 2016 and 2015 , the carrying values of the investments included in cash and equivalents approximated fair value. The amortized cost basis 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 December 31, 2016 :    (In thousands) Total  Due in one year or less $ 24,086  Due after one year through five years -  Due after five through ten years 4,695  Due after ten years 9,300  Total debt securities $ 38,081  The Company received total proceeds of $125.0 million, $42.2 million and $40.7 million from the sale or maturity of available-for-sale marketable securities during the years ended December 31, 2016, 2015 and 2014 . Net unrealized holding gains on available-for-sale securities were less than $0.1 million for each of the years ended December 31, 2016 and 2015 and are included in accumulated other comprehensive loss on the consolidated balance sheets as of December 31, 2016 and 2015 .

Disclosures About Segments Of A

Disclosures About Segments Of An Enterprise And Related Information	12 Months Ended
	Dec. 31, 2016
Disclosures About Segments Of An Enterprise And Related Information [Abstract]
Disclosures About Segments Of An Enterprise And Related Information	Note 4. 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”) 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 Pennsylvania, Maryland, Ohio and Kentucky. ·  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 our 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 for the years ended December 31, 2016, 2015 and 2014 is presented in the following table :    (In thousands) Data R&SB RLEC Access Corporate (Unallocated) Total  For the year ended December 31, 2016  Operating revenues $ 123,604 $ 63,328 $ 19,967 $ - $ 206,899  Cost of revenue 17,909 21,064 - - 38,973  Gross profit 105,695 42,264 19,967 N/A  Direct operating and selling costs 7,489 4,658 653 - 12,800  Indirect operating costs 26,717 9,494 210 - 36,421  Corporate general and administrative costs 15,471 6,395 1,749 12,142 35,757  Adjusted EBITDA (1),(2) 56,018 21,717 17,355 - N/A  Capital expenditures 73,328 10,050 - 649 84,027   For the year ended December 31, 2015:  Operating revenues $ 114,311 $ 67,214 $ 22,744 $ - $ 204,269  Cost of revenues 17,934 24,271 - - 42,205  Gross profit 96,377 42,943 22,744 N/A  Direct operating and selling costs 5,403 4,521 666 - 10,590  Indirect operating costs 25,322 10,043 225 - 35,590  Corporate general and administrative costs 14,933 6,953 1,995 7,231 31,112  Adjusted EBITDA (1) ,(2) 50,719 21,426 19,858 - N/A  Capital expenditures 98,535 9,545 - 7,595 115,675   For the year ended December 31, 2014:  Operating revenues $ 106,642 $ 72,028 $ 22,786 $ - $ 201,456  Cost of revenue 16,767 26,211 - - 42,978  Gross profit 89,875 45,817 22,786 N/A  Direct operating and selling costs 4,755 4,600 667 - 10,022  Indirect operating costs 24,194 10,077 309 - 34,580  Corporate general and administrative costs 14,227 7,660 2,125 (5,942) 18,071  Adjusted EBITDA (1) ,(2) 46,699 23,480 19,685 10,774 N/A  Capital expenditures 66,570 7,089 - 10,441 84,100  (1) Adjusted EBITDA (a non-GAAP measure), 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 or loss attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, employee separation charges, restructuring-related charges, acquisition and separation related charges, gain or loss on settlements and gain or loss on interest rate swap derivatives . See Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations for additional disclosures regarding Adjusted EBITDA (2) In 2016, the Company refined its methodology for allocating certain operating costs to the segments, resulting in immaterial changes to previously reported segment Adjusted EBITDA amounts for the years ended December 31, 2015 and 2014. N/A – Not Applicable (as totals are not presented in the 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. 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 Company did not allocate the curtailment gain of $10.8 million recognized in 2014 due to the discontinuance of certain medical benefits under the postretirement medical plan to the segments and this amount is included in corporate unallocated charges for the year ended December 31, 2014 in the table above. The following table provides a reconciliation of the total of the Company’s reportable segments measure of profit to the Company’s consolidated income before income taxes for the years ended December 31, 2016 , 2015 and 2014 :    Year Ended December 31,  (In thousands) 2016 2015 2014  Data Adjusted EBITDA $ 56,018 $ 50,719 $ 46,699  R&SB Adjusted EBITDA 21,717 21,426 23,480  Access Adjusted EBITDA 17,355 19,858 19,685  Corporate (Unallocated) Adjusted EBITDA - - 10,774  Total reportable segments measure of profit 95,090 92,003 100,638  Interest expense (28,385) (19,918) (15,575)  Gain on interest rate swap derivatives - 665 492  Other (income) expenses, net 389 114 664  Depreciation and amortization and accretion  of asset retirement obligations (51,394) (47,666) (45,330)  Amortization of actuarial losses (1,350) (1,350) (248)  Equity-based compensation (9,581) (5,881) (4,340)  Restructuring charges (1,940) (638) -  Employee separation charges - - (244)  Acquisition and separation related charges (1,211) - -  Income before income taxes $ 1,618 $ 17,329 $ 36,057  One of the Company's carrier customers, AT&T, individually accounted for 7 % of the Company’s total revenue for each of the years ended December 31, 2016 and 2015 and 10% of the Company’s total revenue for the year ended December 31, 201 4 . The Company’s five largest carrier customers, in the aggregate, accounted for 32% of the Company’s total operating revenues for the year ended December 31, 2016 and 31% for each of the years ended December 31, 2015 and 2014. Revenue from these carrier customers was derived primarily from netw ork access, data transport and FTTC services.

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2016
Long-Term Debt [Abstract]
Long-Term Debt	 Note 5. Long-Term Debt As of December 31, 2016 and 2015 , the Company’s outstanding long-term debt consisted of the following:    December 31, 2016 December 31, 2015  (In thousands) Principal Unamortized Discount and Debt Issuance Costs Principal Unamortized Discount and Debt Issuance Costs  Credit Facility $ 340,385 $ 3,283 $ 348,415 $ 4,705  8% Notes 150,000 26,529 150,000 29,607  Capital lease obligations 7,842 - 2,597 -  Long-term debt 498,227 29,812 501,012 34,312  Less: Current portion of long-term debt 13,530 - 10,400 -  Long-term debt, excluding current portion $ 484,697 $ 29,812 $ 490,612 $ 34,312   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 (the “Term Loan A”), a $275 million senior secured six -year term loan (the “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 the Term Loan A and the Term Loan B were used to retire the prior 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 December 31, 2016 , 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. The Term Loan A matures in 2018 with quarterly payments of 1.25% per annum through December 31, 2016 and 2.50% per annum thereafter. The Term Loan B matures in 2019 with quarterly payments of 1% per annum. The 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 4.75 :1.00 through December 31, 2016, 4.50 :1.00 through December 31, 2017, 4.25 :1.00 through December 31, 2018 and 4.00 :1.00 thereafter. The Credit Facility also sets a minimum interest rate coverage ratio of 3.25 :1.00 . At December 31, 2016 , the Company’s leverage ratio was 3.68 :1.00 and its interest coverage ratio was 7.27 :1.00. The Company was in compliance with its debt covenants as of December 31, 2016 . Mandatory prepayments include an excess cash flow sweep equal to 50% of Excess Cash Flow, as defined under the Credit Agreement, for each fiscal year commencing in 2013 for so long as the leverage ratio exceeds 3.25 :1.00. Based on the excess cash flow calculation as of December 31, 2016 , no mandatory prepayment was due for the year ended December 31, 2016 . In accordance with the terms of the Credit Facility, the Company entered into interest rate swap agreements with a combined notional amount of 50 percent of the aggregate outstanding balance of Term Loan A and Term Loan B. Under the interest rate swap agreements, the Company swapped one-month LIBOR with a fixed rate of approximately 0.5% for certain agreements entered into in 2012 and 0.8% for certain agreements entered into in 2013. The interest rate swap agreements expired on December 31, 2015. The Company recognized a net gain on interest rate swap derivatives of $0.7 and $0.5 million for the years ended December 31, 2015 and 2014, respectively. The Company’s effective interest rate on its Credit Facility for the year ended December 31, 2016 was 3.95% . 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, beginning on November 15, 2015. 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 9 for additional information regarding the valuation of 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 presented as a reduction of long-term debt in the consolidated balance sheets in accordance with ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”). These costs are being amortized to interest expense over the life of the debt using the effective interest method. Amortization of debt issuance costs for the years ended December 31, 2016 , 2015 and 2014 was $4.5 million, $2.7 million and $1.5 million, respectively. The Company’s effective interest rate on the 8% Notes for the year ended December 31, 2016 was 12.55% , which represents the contractual rate adjusted for the aforementioned discount and deferred debt issuance costs. 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. The current patronage credit percentages are 75% in cash and 25% in equity. These credits are recorded in the consolidated statements of operations as an offset to interest expense. The patronage credits were $1.0 million, $1.2 million and $0.7 million for the years ended December 31, 2016 , 2015 and 2014 , respectively. The aggregate maturities of the Term Loan A, Term Loan B and Term Loan C under the Credit Facility are $13.0 million in 2017, $70.9 million in 2018 and $256.5 million in 2019. The revolver under the Credit Facility, under which no borrowings are outstanding as of December 31, 2016 , 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”) agreement classified as a capital lease, which was entered into in January 2016. The IRU network capacity arrangement extends through 2035 with payments due monthly. During the second quarter of 2016, the Company fully satisfied a financing obligation related to a software licensing agreement entered into during 2013. As of December 31, 2016 , the combined total net present value of the Company’s future minimum lease payments is $7.8 million and the principal portion of these capital lease obligations was due as follows $0. 5 million in 201 7 and 2018 , $0.4 million in 2019 through 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 December 31, 2016:    December 31, 2016  (In thousands) Historical Cost Accumulated Amortization  Vehicles $ 2,723 $ (1,755)  Network capacity IRU 8,871 (444)  Total $ 11,594 $ (2,199) 

Supplementary Disclosures Of Ca

Supplementary Disclosures Of Cash Flow Information	12 Months Ended
	Dec. 31, 2016
Supplementary Disclosures Of Cash Flow Information [Abstract]
Supplementary Disclosures Of Cash Flow Information	 Note 6. Supplementary Disclosures of Cash Flow Information The following information is presented as supplementary disclosures for the consolidated statements of cash flows for the years ended December 31, 2016 , 2015 and 2014 :    (In thousands) 2016 2015 2014  Cash payments (receipts):  Interest (net of amounts capitalized) $ 23,873 $ 15,467 $ 13,206  Income taxes 395 843 (680)  Supplemental investing and financing  activities:  Additions to property and equipment  included in accounts payable and  other accrued liabilities 2,750 6,906 8,373  Capital lease obligations 7,928 - 123  Dividend declared not paid $ - $ - $ 3,152  Cash payments for interest for the years ended December 31, 2016 , 2015 and 2014 in the table above are net of $0. 8 million, $0. 8 million and $0. 9 million, respectively, of cash received from CoBank for patronage credits (Note 5). The amount of interest capitalized was $ 1.0 million, $ 1.2 million and $ 0.3 million for the years ended December 31, 2016 , 2015 and 2014 , respectively.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	12 Months Ended
	Dec. 31, 2016
Fair Value Of Financial Instruments [Abstract]
Fair Value Of Financial Instruments	Note 7. 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, the Credit Facility (including the current portion) and the 8% Notes as of December 31, 2016 and 2015 . The carrying values of cash and cash equivalents, restricted cash, accounts receivable, accounts payable, capital lease obligations and accrued liabilities approximated their fair values at December 31, 2016 and 2015 . Marketable securities are recorded in the consolidated balance sheets at fair value (see Note 3 and Note 5). The following table presents the placement in the fair value hierarchy of financial assets and liabilities that are measured at fair value on a recurring basis at December 31, 2016 and 2015 :    Fair Value Measurements at December 31, 2016  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  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  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      Fair Value Measurements at December 31, 2015  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  Assets:  Cash equivalents:  Money market mutual funds $ 6,746 $ - $ - $ 6,746  Commercial paper - 1,000 - 1,000  Corporate debt securities - 1,055 - 1,055  Total cash equivalents 6,746 2,055 - 8,801  Marketable securities:  Commercial paper - 8,684 - 8,684  Debt securities issued by U.S. Government agencies - 35,155 - 35,155  Corporate debt securities - 44,972 - 44,972  Total marketable securities - 88,811 - 88,811  Total financial assets $ 6,746 $ 90,866 $ - $ 97,612   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 classif ies these fair value measurements as Level 2 within the fair value hierarchy. 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.    December 31, 2016 December 31, 2015  (In thousands) Carrying Value Fair Value (Level 2) Carrying Value Fair Value (Level 2)  Credit Facility $ 337,102 $ 304,571 $ 343,710 $ 298,400  8% Notes 123,471 133,965 120,393 132,028  Capital lease obligations 7,842 7,842 2,597 2,597 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 and $ 1 . 2 million as of December 31, 2016 and 2015 , respectively, of which $1. 4 million and $ 1 . 1 million, respectively, represents the Company’s investment in CoBank. 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.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
	Dec. 31, 2016
Earnings (Loss) Per Share [Abstract]
(Loss) Earnings Per Share	Note 8. 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 years ended December 31, 2016 , 2015 and 2014 are as follows:    (In thousands, except per share amounts) 2016 2015 2014  Numerator:  Net (loss) income attributable to Lumos Networks Corp. $ (523) $ 10,026 $ 21,528  Less: net income attributable to Lumos Networks Corp. allocable to participating securities - (338) (540)  Numerator for basic and diluted (loss) earnings per common share (523) 9,688 20,988   Denominator:  Weighted average basic shares outstanding 23,370 22,825 22,328  Less: weighted average participating securities and nonvested performance-based restricted shares (813) (791) (581)  Denominator for basic (loss) earnings per common share 22,557 22,034 21,747  Plus: potentially dilutive stock options - 275 363  Denominator for diluted (loss) earnings per common share 22,557 22,309 22,110   Basic (loss) earnings per share $ (0.02) $ 0.44 $ 0.97   Diluted (loss) earnings per share $ (0.02) $ 0.43 $ 0.95  For the year ended December 31, 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 ( 984,144 and 526,957 , respectively) would be antidilutive for the period. For the year ended December 31, 201 5 , the denominator for diluted earnings per common share excludes 740,214 shares related to stock options and 24,000 shares related to restricted stock awards which would be antidilutive for the period . For the year ended December 31, 201 4 , the denominator for diluted earnings per common share excludes 598,463 shares related to stock options and 17,383, shares related to restricted stock awards which would be antidilutive for the period . The earnings per share calculation for the year ended December 31, 2016 and 2015 also exclude the 5,500,000 outstanding stock warrants described in Note 9 as they would be antidilutive for the respective period s .

Stock Options, Restricted Stock

Stock Options, Restricted Stock and Stock Warrants	12 Months Ended
	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments And Stock Warrant [Abstract]
Stock Options, Restricted Stock and Stock Warrants	Note 9. 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 December 31, 2016 , the maximum number of shares of common stock available for awards under the Equity and Cash Incentive Plan is 5,500,000 and 901 , 558 securities remained available for issuance under the Equity and Cash Incentive 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 didn’t issue any stock options under the Equity and Cash Incentive Plan during the year ended December 31, 2016 and issued 323,804 shares of restricted stock. Options issued to employees with service-only conditions generally vest on a graded vesting schedule over a four to five year period. 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 restricted stock awards vest on a graded vesting schedule over a five year period. Certain stock options and restricted shares granted by the Company contain vesting provisions that are conditional on achievement of a target market price for the Company’s common stock . Dividend rights applicable to restricted stock with service-only vesting conditions are equivalent to the Company’s common stock. Restricted stock awards that vest based on achievement of a market condition are not eligible for dividends during the vesting period unless the Compensation Committee determines otherwise. Stock options must be granted under the Equity and Cash Incentive Plan at not less than 100 % of fair value on the date of grant and have a maximum life of ten years from the date of grant. Options and other awards under the Equity and Cash Incentive Plan may be exercised in compliance with such requirements as determined by a committee of the board of directors. Substantially all options outstanding were issued at a strike price equal to or greater than the fair value on the date of grant. The fair value of each option award with service-only vesting conditions is estimated on the grant date using the Black-Scholes option-pricing model with assumptions related to risk-free interest rate, expected volatility, dividend yield and expected term. The risk-free rate is based on the zero-coupon U.S. Treasury rate in effect at the time of grant, with a term equal to the expected life of the options. The expected option life represents the period of time that the options granted are expected to be outstanding and is determined using the simplified method. The expected dividend yield is estimated based on the Company’s actual dividend yield at the date of the grant. There were no stock options granted during the year ended December 31, 2016. The weighted-average grant date fair value per share of stock options granted during the years ended December 31, 2015 and 2014 was $8.09 and $6.68 , respectively. The following weighted-average assumptions were used in estimating the grant date fair value of these awards:    Year Ended December 31, 2015 Year Ended December 31, 2014  Risk-free interest rate 1.90% 1.96%  Expected volatility 55.93% 59.52%  Expected dividend yield 0.00% 3.54%  Expected term 6.3 years 6.1 years The fair value of each restricted stock award with service-only vesting conditions is based on the closing price of the Company’s common stock on the grant date. The fair value for option awards and restricted stock awards with vesting that is conditional on achievement of market conditions is adjusted to reflect the probability of satisfying the market condition based on a Monte Carlo valuation model. The summary of the activity and status of the Company’s stock options for the year ended December 31, 2016 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, 2015 2,182 $ 12.57  Granted during the period - -  Exercised during the period (123) 12.59  Forfeited during the period (35) 13.96  Expired during the period (275) 13.78  Stock options outstanding at December 31, 2016 1,749 $ 12.35 5.2 years $ 6,279   Stock options exercisable at December 31, 2016 1,325 $ 12.17 4.9 years $ 4,997  Total stock options outstanding, vested and expected to vest  at December 31, 2016 1,727 $ 12.36 $ 6,180 The total intrinsic value of stock options exercised during the years ended December 31, 2016, 2015 and 2014 was $0. 2 million, $0. 1 million and $0. 3 million, respectively. The total fair value of options that vested during the years ended December 31, 2016 , 2015 and 2014 was $ 0 . 8 million, $ 1 . 3 million and $ 0 . 5 million, respectively. As of December 31, 2016 , there was $ 0 . 8 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of 1 .5 years. The summary of the activity and status of the Company’s restricted stock for the year ended December 31, 2016 is as follows:     (In thousands, except per share amounts) Shares Weighted-Average Grant Date Fair Value per Share  Restricted stock outstanding at December 31, 2015 861 $ 14.37  Granted during the period 324 12.17  Vested during the period (240) 12.46  Forfeited during the period (96) 15.91  Restricted stock outstanding at December 31, 2016 849 $ 13.85 As of December 31, 2016 , there was $ 4 . 7 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 . 8 years. The total fair value of restricted stock awards that vested during the years ended December 31, 2016, 2015 and 2014 was $ 3 . 0 million, $1.7 million and $ 1 . 7 million, respectively. In addition to the Equity and Cash Incentive Plan discussed above, the Company has an employee stock purchase plan which commenced in November 2011 with 100,000 shares available. As of December 31, 2016 , 6 1 , 657 shares remained available for issuance under the employee stock purchase plan. New common shares will be issued for purchases under this plan or treasury shares will be reissued. Shares are priced at 85 % of the closing price on the last trading day of the month and settle on the second business day of the following month. During the year ended December 31, 2016 , 6,126 shares were issued under the employee stock purchase plan. Compensation expense associated with the employee stock purchase plan was less than $ 0.1 million for the years ended December 31, 2016 , 2015 and 2014 . Stock Warrants On August 6, 2015, in conjunction with the 8% Notes issuance discussed in Note 5, the Company issued for no additional consideration 5,500,000 warrants (the “Warrants”) to purchase shares of the Company’s common stock at an exercise price of $13.99 . The Warran ts are fully vested and exercis able and may be net-share settled on a cashless basis only until they expire on August 6, 2022. The grant date fair value of the Warrants was $4.44 per share, which was estimated using the Black-Scholes option pricing model and the following assumptions:    Risk-free interest rate 1.61 %  Expected volatility 41.53 %  Expected dividend yield 0 %  Expected term 5 years  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. The allocated proceeds of $23.5 million were recorded in additional paid-in capital on the consolidated balance sheet as of December 31, 2016 and 2015 , net of $1.3 million in issuance costs. A summary of the activity and status of the Company’s stock warrants for the year ended December 31, 2016 , is as follows:   (In thousands, except per share amounts) Shares Weighted Average Exercise Price per Share  Stock warrants outstanding at December 31, 2015 5,500 $ 13.99  Granted during the period - -  Exercised during the period - -  Expired during the period - -  Stock warrants outstanding at December 31, 2016 5,500 $ 13.99 

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Taxes [Abstract]
Income Taxes	 Note 10. Income Taxes The components of income tax expense are as follows for the years ended December 31, 2016 , 2015 and 2014 :    (In thousands) 2016 2015 2014  Current tax expense (benefit):  Federal $ - $ - $ -  State 411 379 (68)  Total current tax expense (benefit) 411 379 (68)   Deferred tax expense:  Federal 1,341 6,319 11,908  State 210 448 2,569  Total deferred tax expense 1,551 6,767 14,477  Total income tax expense $ 1,962 $ 7,146 $ 14,409  Total income tax expense was different than an amount computed by applying the graduated federal statutory income tax rates to income before taxes. The reasons for the differences are as follows for the years ended December 31, 2016 , 2015 and 2014 :    (In thousands) 2016 2015 2014  Computed tax expense at federal statutory  rate of 35% $ 567 $ 6,065 $ 12,620  Nondeductible compensation 532 122 27  Noncontrolling interests (69) (61) (47)  Nondeductible public offering costs - 112 -  State income taxes, net of federal income  tax impact 403 538 1,626  Nondeductible interest on 8% Notes 28 578 -  Other, net 501 (208) 183  Total income tax expense $ 1,962 $ 7,146 $ 14,409  During the year s ended December 31, 201 6 and 2015 , the Company recognized excess tax expense ( benefits ) of approximately $0.2 million and ($0.2) million in additional paid-in capital related to stock compensation plans. During the year ended December 31, 2014 , the Company reclassified tax benefits of approximately $1.5 million from additional paid-in capital to deferred tax liabilities associated with unrealized excess tax benefits related to stock compensation plans. As of December 31, 2016 , these tax benefits are available to offset future taxable income. The Company recognized tax expense of $0.6 million and $0.4 million and tax benefits of $ 5.4 million in accumulated other comprehensive income associated with the adjustments to various employee benefit plan liabilities for the years ended December 31, 2016 , 2015 and 2014 , respectively, in accordance with FASB ASC 715. The tax effects of temporary differences that give rise to significant portions of the deferred income tax assets and deferred income tax liabilities at December 31, 2016 and 2015 are presented below:    (In thousands) 2016 2015  Deferred income tax assets:  Retirement benefits other than pension $ 2,181 $ 2,167  Pension and related plans 4,159 4,588  Net operating loss 26,704 16,509  Accrued expenses 7,096 6,848  Interest and discount on 8% Notes 809 -  Other 546 425  Total deferred income tax assets 41,495 30,537   Deferred income tax liabilities:  Property and equipment (128,515) (111,846)  Intangibles (9,968) (7,884)  Total deferred income tax liabilities (138,483) (119,730)  Net deferred income tax liability $ (96,988) $ (89,193)  In the fourth quarter of 2016, the Company recorded an out-of-period adjustment to establish deferred tax liabilities associated with the 2015 issuance of the 8% Notes with an offset to additional paid-in capital in the amount of $5.5 million. At December 31, 2016 , the Company had federal net operating losses (“NOLs”) of $ 69.3 million, net of adjustments for unrecognized income tax benefits (“UTBs”) and unrealized excess tax benefits on stock compensation. The Company’s NOLs, if not utilized to reduce taxable income in future periods, will expire in varying amounts from 202 2 through 203 6 . The Company believe s that it is more likely than not that the reversal of current deferred tax liabilities and the results of future operations will be sufficient to realize the deferred tax assets . The Company recognizes interest related to UTBs in interest expense and penalties on UTBs in income tax expense. A reconciliation of the change in the UTB balance for the years ended December 31, 2016 and 2015 is as follows:    (In thousands) 2016 2015  Balance at beginning of year $ 1,356 $ 1,112  Additions for tax positions related to the current year 235 297  Increases for tax positions related to prior years (96) 109  Statute of limitations expiration (342) (162)  Balance at end of year $ 1,153 $ 1,356 All of the Company’s UTBs as of December 31, 2016 and 2015 were adjusted through income tax expense. The Company does not expect to have any material changes to its UTBs over the next twelve months. While the Company believes it has adequately provided for all 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, the tax years that remain open and subject to federal and state audit examinations are 201 3 -201 6 as of December 31, 2016 .

Pension Plans And Other Postret

Pension Plans And Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2016
Pension Plans And Other Postretirement Benefits [Abstract]
Pension Plans And Other Postretirement Benefits	Note 11. Pension Plans and Other Postretirement Benefits The Company sponsors a non-contributory defined benefit pension plan (“Pension Plan”), as well as non- qualified pension plans and other postretirement benefit plan (“OPEB”) for its eligible employees. The Company recognized total income of $0.7 million, $ 1.3 million and $1.1 million (excluding the curtailment gain discussed below) in 2016, 2015 and 2014 respectively, for all qualified and non-qualified pension and OPEB plans. Effective December 31, 2012, the Company froze the accumulation of benefits under the Pension Plan and the supplemental executive retirement plan. As such, no further benefits will be accrued by plan participants for services rendered after that date under either of these plans. Effective December 31, 2014, the Company terminated the health care benefits under the Other Postretirement Benefit Plans. Eligible retirees received partial compensation for settlement of accrued benefits through a series of supplemental pension payments. As a result, the Company recognized a curtailment gain of approximately $10.8 million in the year ended December 31, 2014, which was calculated as the decrease in the accumulated benefit obligation resulting from the termination of the medical portion of the Other Postretirement Benefit Plans less unrecognized losses in accumulated other comprehensive loss and less the actuarially determined cost of the benefit obligation that was transferred to the Pension Plan in the form of supplemental benefit payments on December 31, 2014. The following tables provide a reconciliation of the changes in the qualified plans’ benefit obligations and fair value of assets and a statement of the funded status as of December 31, 2016 , 2015 and 2014 and the classification of amounts recognized in the consolidated balance sheets:    Defined Benefit Pension Plan Other Postretirement Benefit Plans  (In thousands) Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014  Change in benefit obligations:  Benefit obligations, beginning of period $ 65,725 $ 70,892 $ 57,209 $ 765 $ 844 $ 12,800  Service cost - - - - - 80  Interest cost 2,696 2,664 2,622 30 31 373  Actuarial loss (gain) 763 (4,550) 13,547 22 (83) 887  Benefits paid, net (2,891) (3,281) (2,956) (115) (27) (671)  Curtailment gain - - - - - (12,625)  Transfer - - 470 - - -  Benefit obligations, end of period $ 66,293 $ 65,725 $ 70,892 $ 702 $ 765 $ 844   Change in plan assets:  Fair value of plan assets, beginning of period $ 53,912 $ 58,403 $ 57,847 $ - $ - $ -  Actual return on plan assets 4,606 (1,166) 3,555 - - -  Employer contributions - - - 115 27 671  Benefits paid (2,945) (3,325) (2,999) (115) (27) (671)  Transfer - - - - - -  Fair value of plan assets, end of period $ 55,573 $ 53,912 $ 58,403 $ - $ - $ -   Funded status:  Non-current asset $ - $ - $ - $ - $ - $ -  Current liabilities - - - 56 111 72  Non-current liabilities 10,720 11,813 12,489 646 654 772  Funded status recognized in the consolidated balance sheets $ 10,720 $ 11,813 $ 12,489 $ 702 $ 765 $ 844   Amounts recognized in accumulated other comprehensive loss:  Net actuarial (loss) gain $ (16,598) $ (17,899) $ (18,119) $ 111 $ 18 $ (65)  Income taxes 6,440 6,981 7,066 (43) (7) 25  Net amount recognized in accumulated other comprehensive loss $ (10,158) $ (10,918) $ (11,053) $ 68 $ 11 $ (40) The accumulated benefit obligation for the defined benefit pension plan at December 31, 2016 and 2015 was $6 6 . 3 million and $ 65 . 7 million, respectively. The increase in the projected benefit obligation is primarily attributable to actuarial losses resulting from a decrease in the discount rate from 4 . 20 % at December 31, 201 5 to 4. 00 % at December 31, 2016 and adjusted mortality tables. The accumulated benefit obligation represents the present value of pension benefits based on service and salary earned to date. The benefit obligation indicated in the table above is the projected benefit obligation which represents the present value of pension benefits taking into account projected future service and salary increases. The projected benefit obligation is equal to the accumulated benefit obligation as of December 31, 2016 and 2015 since the Pension Plan was frozen effective as of December 31, 2012. The total amounts reclassified out of accumulated other comprehensive income related to amortization of actuarial losses for the pension and other postretirement benefit plans for each of the years ended December 31, 2016 and 2015 were $ 0. 9 million , net of income taxes of $0. 5 million, and $0. 1 million , net of income taxes of less than $0.1 million, for the year ended December 31, 2014 . Amortization of actuarial losses is included in selling, general and administrative expenses on the consolidated statements of operations . The following table provides the components of net periodic (benefit) expense for the plans for the years ended December 31, 2016 , 2015 and 2014 :   Defined Benefit Pension Plan Other Postretirement Benefit Plans  (In thousands) Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014  Components of net periodic (benefit) expense:  Service cost $ - $ - $ - $ - $ - $ 80  Interest cost 2,696 2,664 2,622 30 31 373  Expected return on plan assets (3,536) (4,111) (4,373) - - -  Amortization of loss 1,049 991 - - - 23  Net periodic expense (benefit) $ 209 $ (456) $ (1,751) $ 30 $ 31 $ 476 Actuarial gains and losses in excess of 10% of the greater of the benefit obligation and the market-related value of assets are amortized over the average remaining service period of active participants. The assumptions used in the measurements of the Company’s benefit obligations at December 31, 2016 and 2015 are shown in the following table:    Defined Benefit Pension Plan Other Postretirement Benefit Plans  December 31, 2016 December 31, 2015 December 31, 2016 December 31, 2015  Discount rate 4.00 % 4.20 % 4.00 % 4.20 %  Rate of compensation increase N/A N/A N/A N/A  The assumptions used in the measurements of the Company’s net income or expense for the consolidated statement s of operations for the years ended December 31, 2016 , 2015 and 2014 were as follows:    Defined Benefit Pension Plan Other Postretirement Benefit Plans  Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014  Discount rate 4.20 % 3.85 % 4.70 % 4.20 % 3.85 % 4.70 %  Expected return on plan assets 6.75 % 7.25 % 7.75 % N/A N/A N/A  Rate of compensation increase N/A N/A N/A N/A N/A N/A  The Company reviews the assumptions noted in the above table annually or more frequently to reflect anticipated future changes in the underlying economic factors used to determine these assumptions. The discount rates assumed reflect the rate at which the Company could invest in high quality corporate bonds in order to settle future obligations. In doing so, the Company utilizes a Citigroup Pension Discount Curve applied against the Company’s estimated defined benefit payments to derive a blended rate. The Citigroup Pension Discount Curve is derived from over 350 Aa corporate bonds . The Company also compares this to a Moody’s ten year Aa bond index for reasonableness. In developing the expected long-term rate of return assumption for the assets of the Pension Plan, the Company evaluated input from its third party pension plan asset managers, including their review of asset class return expectations and long-term inflation assumptions. The Company also considered the related historical ten-year average asset return at December 31, 2016 as well as considering input from the Company’s third party pension plan asset managers. The weighted average actual asset allocations by asset category and the fair value by asset category as of December 31, 2016 and 2015 were as follows:    (Dollars in thousands) December 31, 2016 December 31, 2015  Asset Category Actual Allocation Fair Value Actual Allocation Fair Value  Large Cap Value 23 % $ 12,518 23 % $ 12,193  Large Cap Blend 11 % 6,237 11 % 6,085  Mid Cap Blend 7 % 3,676 6 % 3,342  Small Cap Blend 4 % 2,308 4 % 2,080  Foreign Stock - Large Cap 6 % 3,586 7 % 3,817  Bond 33 % 18,633 34 % 18,239  Cash and cash equivalents 16 % 8,615 15 % 8,156  Total 100 % $ 55,573 100 % $ 53,912  The actual and target allocation for plan assets is broadly defined and measured as follows:    December 31, 2016 December 31, 2015  Asset Category Actual Allocation Target Allocation Actual Allocation Target Allocation  Equity securities 51 % 50 % 51 % 50 %  Bond securities and cash equivalents 49 % 50 % 49 % 50 %  Total 100 % 100 % 100 % 100 % It is the Company’s policy to invest pension plan assets in a diversified portfolio consisting of an array of asset classes. The investment risk of the assets is limited by appropriate diversification both within and between asset classes. The assets are primarily invested in investment funds that invest in a broad mix of publicly traded equities, bonds and cash equivalents (and fair value is based on quoted market prices (Level 1 input within the fair value hierarchy previously defined)). The allocation between equity and bonds is reset quarterly to the target allocations. Updates to the allocation are considered in the normal course and changes may be made when appropriate. The bond holdings consist of three bond funds split relatively evenly between these funds at December 31, 2016 . At December 31, 2016 , the Company believes that there are no material concentrations of risk within the portfolio of plan assets. The assumed long term return noted above is the target long term return. Overall return, risk adjusted return, and management fees are assessed against a peer group and benchmark indices. Reporting on asset performance is provided quarterly and review meetings are held semi-annually. In addition to normal rebalancing to maintain an adequate cash reserve, projected cash flow needs of the plan are reviewed at least annually to ensure liquidity is properly managed. The Company did not contribute to the Pension Plan in 201 6 , 201 5 or 201 4 and does not expect to contribute to the Pension Plan in 201 7 . The Company expects the net periodic expense for the Pension Plan in 201 7 to be $ 0.6 million and the expense for the other postretirement benefit plans in 201 7 to be less than $ 0.1 million. The following estimated future pension benefit payments and other postretirement benefit plan payments which reflect expected future service, as appropriate, are expected to be paid in the years indicated:    (In thousands) Year Defined Benefit Pension Plan Other Postretirement Benefit Plans  2017 $ 3,074 $ 57  2018 3,111 57  2019 3,214 56  2020 3,247 55  2021 3,315 54  2022-2026 17,197 245 Other Benefit Plans The Company also has a supplemental executive retirement plan (“SERP”). T he Company froze the SERP effective December 31, 2012. As such, no further benefits will be accrued by plan participants for services rendered and the accumulated benefit obligation is equivalent to the projected benefit obligation for periods ending after that date. The projected benefit obligation was $4.8 million, $4.6 million and $4.9 million as of December 31, 2016 , 2015 and 2014 , respectively. The Company recognized $0.2 million, $0. 4 million and $0. 2 million of expense from previously unrecognized loss related to the supplemental executive retirement plan during the years ended December 31, 2016, 2015 and 2014 , respectively, all of which is included in selling, general and administrative expenses in the consolidated statements o f operations . The total amount of unrecognized actuarial losses recognized in accumulated other comprehensive income at December 31, 2016 and 2015 related to this plan was $ 0.9 million, net of income taxes of $ 0 .6 million, and $ 1.0 million, net of income taxes of $ 0.6 million, respectively. The e stimated future benefit payments are expected to be $ 0.2 million annually for each of the years 2017 through 2019, $0.3 million annually for each of the years 2020 through 2021 and $ 1.4 million in aggregate for the years 202 2 through 202 6 . The Company also sponsors a defined contribution 401(k) plan. The Company’s matching contributions to this plan were $ 1.1 million, $ 1.1 million and $ 1.0 million for the years ended December 31, 2016 , 2015 and 2014 , respectively. The Company funds its 401(k) matching contributions in shares of the Company’s common stock.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Note 12. 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 $4. 4 million, $4.7 million and $5.0 million in the years ended December 31, 2016 , 2015 and 2014 , respectively, which is presented in the Company’s data segment revenues. At both December 31, 2016 and 2015 , the Company had accounts receivable from ValleyNet of approximately $0.4 million. The Company also leases and resells capacity from ValleyNet. The total lease expense was $1.2 million, $1.2 million and $0.9 million in the years ended December 31, 2016 , 2015 and 2014 , respectively, which is presented as cost of revenue in the consolidated statements of operations.

Restructuring Charges

Restructuring Charges	12 Months Ended
	Dec. 31, 2016
Restructuring Charges [Abstract]
Restructuring Charges	Note 13. Restructuring Charges In 2016, the Company com pleted an employee reduction-in-force. Restructuring costs, consisting of employee severance a nd termination benefits, of $1.9 million were recognized during the year ended December 31 , 2016. The Company does not expect to incur additional costs associated with these restructuring activities in future periods.  The following table provides a break-down of these costs by business segment for the year ended December 31, 2016:       (In thousands) Data R&SB RLEC Access Total  Employee severance and termination benefits $ 1,451 $ 412 $ 77 $ 1,940  Total restructuring charges $ 1,451 $ 412 $ 77 $ 1,940  A liability for restructuring charges in the amount of $0.4 million is included in accrued compensation in the Company’s consolidated balance sheet as of December 31 , 2016, related to employee termination costs accrued, but not yet paid.  Below is a summary of the restructuring liability balance as of December 31 , 2016:      (In thousands) Employee Severance and Termination Benefits Total  Beginning balance at December 31, 2015 $ - $ -  Additions, net of adjustment 1,940 1,940  Payments (1,542) (1,542)  Ending balance at December 31, 2016 $ 398 $ 398  

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies [Abstract]
Commitments And Contingencies	Note 1 4 . Commitments and Contingencies Operating Leases Rental expense , including certain related lease costs, which are not separately identifiable, for all operating leases for the years ended December 31, 2016 , 2015 and 2014 was $ 12.1 million , $12.0 m illion and $10.2 million, respectively. The total amount committed under these lease agreements at December 31, 2016 is: $ 3.6 million in 201 7 , $ 3.0 million in 201 8 , $ 2.3 million in 201 9 , $ 1.2 million in 20 20 , $ 0. 7 million in 202 1 and $ 1.5 million for the years thereafter. These amounts include leases for office space and office equipment and collocation and other network facilities. Capital Leases See Note 5 for information regarding the Company’s capital lease obligations and future commitments associated with those obligations. Other Commitments and Contingencies 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 consolidated financial statements. The Company has other purchase commitments relating to capital expenditu res totaling $ 2.8 million as of December 31, 2016 , which are expected to be satisfied during 2017.

Subsequent Event

Subsequent Event	12 Months Ended
	Dec. 31, 2016
Subsequent Event [Abstract]
Subsequent Event	Note 15. Subsequent Events On January 4, 2017 , the Company closed on an acquisition of Clarity Communications, LLC , a North Carolina based fiber bandwidth provider for a total purchase price of approximately $15 million, $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.  On January 31, 2017 , the Company closed on an acquisition of DC74 LLC , a North Carolina based data center and managed services provider for a total purchase price of approximately $28 to $29 million, $23.5 million of which was paid in cash upon closing with the remaining $5 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.  On February 18, 2017, we entered into a definitive agreement (“Merger Agreement”) by and among the Company, MTN Infrastructure TopCo, Inc. (“Parent”) and MTN Infrastructure BidCo, Inc. (“Me rger Sub”), pursuant to which we will be acquired by EQT Infrastructure investment strategy (“EQT Infrastructure”) , subject to shareholder approval, regulatory approval and other customary closing conditions. 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.

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Abstract]
Principles Of Consolidation And Basis Of Presentation	Principles of Consolidation and Basis of Presentation The 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, exercised control. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain presentation changes have been made within the operating expense line items on the consolidated statements of operations and prior period amounts have been reclassified in order to conform to the current year presentation. Specifically, the previously reported line item “network access costs” has been removed and the new line item “cost of revenue” has been added along with the necessary operating expense reclassifications. These reclassifications were not the result of an error and have no effect on previously reported operating income, net income or earnings per share.
Accounting Estimates	Accounting Estimates The preparation of 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 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; the valuation of deferred tax assets and/or liabilities, asset retirement obligations and equity-based compensation; goodwill impairment assessments; actuarial determination of employee benefit obligations; stock warrants; and reserve for uncertain income tax positions.
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 investments 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 December 31, 2016 and 2015 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 December 31, 2016 and 2015.
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 Maryland, Pennsylvania, Ohio and Kentucky. 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 expense in the consolidated statements of operations. The following table shows the activity in the allowance for doubtful accounts and customer credits for the years ended December 31, 2016 , 2015 and 2014 :     (In thousands) 2016 2015 2014  Allowance for doubtful accounts and customer credits, beginning $ 1,235 $ 1,217 $ 1,485  Additions:  Charged to expense 236 461 604  (Deducted from) charged to other accounts (97) 96 (19)  Deductions (432) (539) (853)  Allowance for doubtful accounts and customer credits, ending $ 942 $ 1,235 $ 1,217
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 Financial Accounting Standards Board (“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 December 31, 2016 that would require it 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 experience and future expectations. As of December 31, 2016 the estimated lives for each category of property, plant and equipment are as follows:    Estimated Life  Buildings 50 years  Network plant and equipment 3 to 50 years  Furniture, fixtures and other equipment 4 to 24 years  Leasehold improvements, which are categorized in land and buildings, are depreciated over the shorter of the estimated useful lives or the remaining lease terms. 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 (“IRU”), is included with depreciation expense. Intangibles with a finite life are classified as other intangibles on the consolidated balance sheets. At December 31, 2016 and 2015 , other intangibles were comprised of the following:      2016 2015  (Dollars in thousands) Estimated Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization  Customer relationships 6 to 15 yrs $ 103,108 $ (95,463) $ 103,108 $ (93,051)  Trademarks and franchise rights 10 to 15 yrs 2,862 (2,004) 2,862 (1,841)  Total $ 105,970 $ (97,467) $ 105,970 $ (94,892)  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 amortization for certain customer relationship intangibles is being recognized 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 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 years ended December 31, 2016 or 2015 . Amortization expense for the years ended December 31, 2016 , 2015 and 2014 was $ 2.6 million, $ 4.8 million and $ 9.2 million, respectively. Amortization expense for the next five years is expected to be as follows:    (In thousands) Customer Relationships Trademarks and Franchise Rights Total  2017 $ 2,093 $ 163 $ 2,256  2018 1,781 163 1,944  2019 1,513 152 1,665  2020 1,146 48 1,194  2021 1,112 - 1,112 
Goodwill and Indefinite-Lived Intangible Assets	Goodwill and Indefinite-Lived Intangible Assets Goodwill and franchise rights 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 assets annually on October 1 and whenever adverse events or changes in circumstances indicate that impairment may have occurred. The Company first considers whether to take a qualitative approach in determining whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step quantitative goodwill impairment test promulgated by FASB ASC Topic 350. If the Company determines that it is more likely than not that a reporting unit’s fair value is less than its carrying amount or if the Company elects to bypass the qualitative test for a specific period, the two-step process is used to test for goodwill impairment. Step one requires a determination of the fair value of each of the reporting units and, to the extent that the fair value of the reporting unit exceeds its carrying value (including goodwill), the step two calculation of implied fair value of goodwill is not required and no impairment loss is recognized. In testing for goodwill impairment, the Company utilizes a market approach that includes the use of comparable multiples of publicly traded companies whose services are comparable to ours and recent M&A activity. As of December 31, 2016 , goodwill was attributed to the Company’s segments as follows:    (In thousands) December 31, 2016  Data $ 90,561  R&SB 9,736  RLEC Access -  Total goodwill $ 100,297  As of October 1, 2016, the Company performed its annual goodwill impairment test for each of its reporting units with goodwill, which are two of our three operating segments (data and R&SB). After a preliminary assessment, the Company elected to bypass the qualitative assessment and applied step one of the quantitative test as described above. Based on the results of this annual impairment testing, the Company determined that the fair values of each of the data and R&SB reporting units substantially exceed their respective carrying amounts and that no impairment exists. The gross amount of goodwill was $133.7 million and the accumulated impairment loss was $33.4 million for a net carrying amount of $100.3 million as of December 31, 2016 and 2015 . There was no activity in the consolidated goodwill accounts for the years ended 2016 and 2015 . 
Accounting For Asset Retirement Obligations	Accounting for Asset Retirement Obligations An asset retirement obligation is evaluated and recorded as appropriate on assets for which the Company has a legal obligation to retire. The Company records a liability for an asset retirement obligation and the associated asset retirement cost capitalized at the time the underlying asset is acquired. Subsequent to the initial measurement of the asset retirement obligation, the obligation is adjusted at the end of each period to reflect the passage of time and changes in the estimated future cash flows underlying the obligation. The Company enters into various facility collocation agreements and is subject to locality franchise ordinances. The Company constructs assets at these locations and, in accordance with the terms of many of these agreements, the Company is obligated to restore the premises to their original condition at the conclusion of the agreements, generally at the demand of the other party to these agreements. The Company recognizes the fair value of a liability for an asset retirement obligation and capitalizes that cost as part of the cost basis of the related asset, depreciating it over the useful life of the related asset. Included in certain of the franchise ordinances under which the Company’s RLECs and CLECs operate are clauses that require the removal of the RLEC’s and CLEC’s equipment at the termination of the franchise agreement. The Company has not recognized an asset retirement obligation for these liabilities as the removal of the equipment is not estimable due to an indeterminable end date and the fact that the equipment is part of the public switched telephone network and it is not reasonable to assume the jurisdictions would require its removal. The following table indicates the changes to the Company’s asset retirement obligation liability, which is included in other long-term liabilities, for the years ended December 31, 2016 and 2015 :     (In thousands) 2016 2015  Asset retirement obligations, beginning $ 1,720 $ 1,500  Additional asset retirement obligations recorded, net of  adjustments in estimates - 81  Accretion of asset retirement obligations 115 139  Asset retirement obligations, ending $ 1,835 $ 1,720 
Advertising Costs	Advertising Costs The Company expenses advertising costs and marketing production costs as incurred (included within selling, general and administrative expenses in the consolidated statements of operations). Advertising expense for the years ended December 31, 2016 , 2015 and 2014 was $0.9 million, $ 0.7 million and $ 1.4 million, respectively.
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 (“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. Vested pension benefits were based on years of service and an average of the five highest consecutive years of compensation and are subject to certain reductions if the employee retires and elects to receive the benefit prior to reaching age 65 . The Company has a nonqualified pension plan that was also frozen as of December 31, 2012. Sections 412 and 430 of the Internal Revenue Code and ERISA Sections 302 and 303 establish minimum funding requirements for defined benefit pension plans. The minimum required contribution is generally equal to the target normal cost plus the shortfall amortization installments for the current plan year and each of the six preceding plan years less any calculated credit balance. The Company’s policy is to make contributions to stay at or above the threshold required in order to prevent benefit restrictions and related additional notice requirements and is intended to provide for benefits to be paid in the future. No contributions were made during the year ended December 31, 2016 and the Company does not expect to make a contribution in 2017.  The Company also provides certain postretirement life insurance benefits for retired employees through the qualified nonpension postretirement welfare benefit plan (the “Other Postretirement Benefit Plan”), which is contributory. Eligibility for the life insurance plan is restricted to active pension participants age 50-64 as of January 5, 1994 and is not eligible to employees hired after April 1993. The Company previously provided health care benefits for retired employees, however, the Company terminated those benefits effective December 31, 2014. Eligible retirees received partial compensation for settlement of accrued benefits through a series of supplemental pension payments in 2014. As a result, the Company recognized a curtailment gain of $10.8 million in the year ended December 31, 2014 (see Note 11).  The Company accounts for the pension and postretirement benefits other than pensions by accruing the cost of such benefits over the service periods of employees. Unrecognized actuarial gains and losses are amortized over the estimated average remaining service period for active employees and over the estimated average remaining life for retirees. The Company recognizes in its consolidated balance sheets the amount of the Company’s unfunded Accumulated Postretirement Benefit Obligation (“APBO”) at the end of the year. Amounts recognized in accumulated other comprehensive income (loss) are adjusted out of accumulated other comprehensive income (loss) when they are subsequently recognized as components of net periodic benefit cost (income). The Company sponsors a contributory defined contribution plan under Internal Revenue Code Section 401(k) for substantially all employees. The Company’s policy is to match 100 % of each participant’s annual contributions for contributions up to 1 % of each participant’s annual compensation and 50 % of each participant’s annual contributions up to an additional 5 % of each participant’s annual compensation. Company contributions vest after two years of service.
Operating Leases	Operating Leases The Company has operating leases for administrative office space and equipment, certain of which have renewal options. These leases, with few exceptions, provide for automatic renewal options and escalations that are either fixed or based on the consumer price index. Any rent abatements, along with rent escalations, are included in the computation of rent expense calculated on a straight-line basis over the lease term. The Company’s minimum lease term for most leases includes the initial non-cancelable term and at least one renewal period to the extent that the exercise of the related renewal option or options is reasonably assured. A renewal option or options is determined to be reasonably assured if failure to renew the leases imposes an in-substance economic penalty on the Company. Leasehold improvements are capitalized and depreciated over the shorter of the assets’ useful life or the lease term, including renewal option periods that are reasonably assured.
Income Taxes	Income Taxes Deferred income taxes are provided on an asset and liability method whereby deferred tax assets are recognized for deductible temporary differences and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. The Company accrues interest and penalties related to unrecognized tax benefits in interest expense and income tax expense, respectively. For balance sheet presentation purposes, the Company nets its deferred tax asset and deferred tax liability positions by tax jurisdiction and classifies the resulting net deferred tax asset and/or net deferred tax liability as noncurrent in accordance with FASB Accounting Standards Update (“ASU”) 2015-17, Income Taxes (Topic 740) Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”).
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 consolidated balance sheet. 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. The fair value of common stock options granted with service-only conditions is estimated at the respective measurement date using the Black-Scholes option-pricing model with assumptions related to risk-free interest rate, expected volatility, dividend yield and expected term. The fair value of restricted stock awards granted with service-only conditions is estimated based on the market value of the common stock on the date of grant reduced by the present value of expected dividends as applicable. Certain stock options and restricted shares granted by the Company in 2012 and 2013 contain vesting provisions that are conditional on achievement of a target market price for the Company’s common stock. The grant date fair value of these options was determined using a Monte Carlo model to reflect the probability of achieving the market condition. The Company initially recognizes the related compensation cost for these awards that contain a market condition on a straight-line basis over the requisite service period as derived from the valuation model. The Company accelerates expense recognition if the market conditions are achieved prior to the end of the derived requisite service period. Total equity-based compensation expense related to all of the share-based awards (Note 9), annual employee bonuses paid in the form of immediately vested shares and the Company’s 401(k) matching contributions, was $9.6 million, $5.9 million and $4.3 million for the years ended December 31, 2016 , 2015 and 2014 , respectively, which amounts are included in selling, general and administrative expenses in the consolidated statements of operations. Future charges for equity-based compensation related to instruments outstanding at December 31, 2016 for the years 2017 through 2019 are estimated to be $ 3.5 million, $ 1.7 million, $ 0.4 million and less than $0.1 million for each of 2020 and 2021, respectively.
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 - Un adjusted 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 (“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. 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 initial 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 expects to 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 February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis (“ASU 2015-02”). 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. ASU 2015-02 is effective for fiscal years, and interim reporting periods within those fiscal years, beginning after September 1, 2016. The Company does not expect the future adoption of ASU 2015-02 to have a material impact on its consolidated financial statements and disclosures. 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 sheet 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 March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718) (“ASU 2016-09”), which simplifies the accounting for share-based payment transactions. 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. ASU 2016-09 is effective for public business entities for annual reporting periods beginning after December 15, 2016, with early adoption permitted. The transition method required by ASU 2016-09 varies by amendment. The Company will implement this new standard on its effective date and it does not expect the adoption of 2016-09 to have a material impact on its consolidated financial statements and disclosures. However, the Company cannot provide any assurance regarding their future impacts. Ad ditionally, the ad option of the accounting policy election to record forfeitures as incurred may increase the volatility of equity based compensation. 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 of 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.

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Summary of Significant Accounting Policies [Abstract]
Schedule of Allowance for Doubtful Accounts	   (In thousands) 2016 2015 2014  Allowance for doubtful accounts and customer credits, beginning $ 1,235 $ 1,217 $ 1,485  Additions:  Charged to expense 236 461 604  (Deducted from) charged to other accounts (97) 96 (19)  Deductions (432) (539) (853)  Allowance for doubtful accounts and customer credits, ending $ 942 $ 1,235 $ 1,217 
Schedule of Property, Plant and Equipment	  Estimated Life  Buildings 50 years  Network plant and equipment 3 to 50 years  Furniture, fixtures and other equipment 4 to 24 years 
Finite-Lived Intangibles Assets	  2016 2015  (Dollars in thousands) Estimated Life Gross Amount Accumulated Amortization Gross Amount Accumulated Amortization  Customer relationships 6 to 15 yrs $ 103,108 $ (95,463) $ 103,108 $ (93,051)  Trademarks and franchise rights 10 to 15 yrs 2,862 (2,004) 2,862 (1,841)  Total $ 105,970 $ (97,467) $ 105,970 $ (94,892)  
Schedule Of Future Amortization Expense	   (In thousands) Customer Relationships Trademarks and Franchise Rights Total  2017 $ 2,093 $ 163 $ 2,256  2018 1,781 163 1,944  2019 1,513 152 1,665  2020 1,146 48 1,194  2021 1,112 - 1,112 
Schedule Of Goodwill Attributed To Segments	  (In thousands) December 31, 2016  Data $ 90,561  R&SB 9,736  RLEC Access -  Total goodwill $ 100,297 
Schedule Of Changes In Asset Retirement Obligations	  (In thousands) 2016 2015  Asset retirement obligations, beginning $ 1,720 $ 1,500  Additional asset retirement obligations recorded, net of  adjustments in estimates - 81  Accretion of asset retirement obligations 115 139  Asset retirement obligations, ending $ 1,835 $ 1,720 

Cash Equivalents And Marketab26

Cash Equivalents And Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2016
Cash Equivalents And Marketable Securities [Abstract]
Schedule Of Cash Equivalents And Available-For-Sale Securities Reported At Fair Value	  (In thousands) December 31, 2016 December 31, 2015  Cash equivalents:  Money market mutual funds $ 6,742 $ 6,746  Commercial paper - 1,000  Corporate debt securities 413 1,055  Total cash equivalents 7,155 8,801  Marketable securities:  Commercial paper 7,370 8,684  Debt securities issued by U.S. Government agencies - 35,155  Corporate debt securities 16,716 44,972  Variable rate demand notes 13,995 -  Total marketable securities, available-for-sale 38,081 88,811   Total cash equivalents and marketable securities $ 45,236 $ 97,612 
Schedule Of Contractual Maturities Of Available-For-Sale Debt Securities	  (In thousands) Total  Due in one year or less $ 24,086  Due after one year through five years -  Due after five through ten years 4,695  Due after ten years 9,300  Total debt securities $ 38,081 

Disclosures About Segments of27

Disclosures About Segments of an Enterprise and Related Information (Tables)	12 Months Ended
	Dec. 31, 2016
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 year ended December 31, 2016  Operating revenues $ 123,604 $ 63,328 $ 19,967 $ - $ 206,899  Cost of revenue 17,909 21,064 - - 38,973  Gross profit 105,695 42,264 19,967 N/A  Direct operating and selling costs 7,489 4,658 653 - 12,800  Indirect operating costs 26,717 9,494 210 - 36,421  Corporate general and administrative costs 15,471 6,395 1,749 12,142 35,757  Adjusted EBITDA (1),(2) 56,018 21,717 17,355 - N/A  Capital expenditures 73,328 10,050 - 649 84,027   For the year ended December 31, 2015:  Operating revenues $ 114,311 $ 67,214 $ 22,744 $ - $ 204,269  Cost of revenues 17,934 24,271 - - 42,205  Gross profit 96,377 42,943 22,744 N/A  Direct operating and selling costs 5,403 4,521 666 - 10,590  Indirect operating costs 25,322 10,043 225 - 35,590  Corporate general and administrative costs 14,933 6,953 1,995 7,231 31,112  Adjusted EBITDA (1) ,(2) 50,719 21,426 19,858 - N/A  Capital expenditures 98,535 9,545 - 7,595 115,675   For the year ended December 31, 2014:  Operating revenues $ 106,642 $ 72,028 $ 22,786 $ - $ 201,456  Cost of revenue 16,767 26,211 - - 42,978  Gross profit 89,875 45,817 22,786 N/A  Direct operating and selling costs 4,755 4,600 667 - 10,022  Indirect operating costs 24,194 10,077 309 - 34,580  Corporate general and administrative costs 14,227 7,660 2,125 (5,942) 18,071  Adjusted EBITDA (1) ,(2) 46,699 23,480 19,685 10,774 N/A  Capital expenditures 66,570 7,089 - 10,441 84,100  (1) Adjusted EBITDA (a non-GAAP measure), 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 or loss attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, employee separation charges, restructuring-related charges, acquisition and separation related charges, gain or loss on settlements and gain or loss on interest rate swap derivatives. See Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations for additional disclosures regarding Adjusted EBITDA (2) In 2016, the Company refined its methodology for allocating certain operating costs to the segments, resulting in immaterial changes to previously reported segment Adjusted EBITDA amounts for the years ended December 31, 2015 and 2014. N/A – Not Applicable (as totals are not presented in the consolidated statements of operations).
Reconciliation of Total of Reportable Segments Measure of Profit to Consolidated Income (Loss) Before Income Taxes	   Year Ended December 31,  (In thousands) 2016 2015 2014  Data Adjusted EBITDA $ 56,018 $ 50,719 $ 46,699  R&SB Adjusted EBITDA 21,717 21,426 23,480  Access Adjusted EBITDA 17,355 19,858 19,685  Corporate (Unallocated) Adjusted EBITDA - - 10,774  Total reportable segments measure of profit 95,090 92,003 100,638  Interest expense (28,385) (19,918) (15,575)  Gain on interest rate swap derivatives - 665 492  Other (income) expenses, net 389 114 664  Depreciation and amortization and accretion  of asset retirement obligations (51,394) (47,666) (45,330)  Amortization of actuarial losses (1,350) (1,350) (248)  Equity-based compensation (9,581) (5,881) (4,340)  Restructuring charges (1,940) (638) -  Employee separation charges - - (244)  Acquisition and separation related charges (1,211) - -  Income before income taxes $ 1,618 $ 17,329 $ 36,057 

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Long-Term Debt [Abstract]
Schedule Of Long-Term Debt	  December 31, 2016 December 31, 2015  (In thousands) Principal Unamortized Discount and Debt Issuance Costs Principal Unamortized Discount and Debt Issuance Costs  Credit Facility $ 340,385 $ 3,283 $ 348,415 $ 4,705  8% Notes 150,000 26,529 150,000 29,607  Capital lease obligations 7,842 - 2,597 -  Long-term debt 498,227 29,812 501,012 34,312  Less: Current portion of long-term debt 13,530 - 10,400 -  Long-term debt, excluding current portion $ 484,697 $ 29,812 $ 490,612 $ 34,312 
Schedule of Capital Leased Assets [Table Text Block]	   December 31, 2016  (In thousands) Historical Cost Accumulated Amortization  Vehicles $ 2,723 $ (1,755)  Network capacity IRU 8,871 (444)  Total $ 11,594 $ (2,199) 

Supplementary Disclosures Of 29

Supplementary Disclosures Of Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2016
Supplementary Disclosures Of Cash Flow Information [Abstract]
Supplementary Disclosures of Cash Flow Information	  (In thousands) 2016 2015 2014  Cash payments (receipts):  Interest (net of amounts capitalized) $ 23,873 $ 15,467 $ 13,206  Income taxes 395 843 (680)  Supplemental investing and financing  activities:  Additions to property and equipment  included in accounts payable and  other accrued liabilities 2,750 6,906 8,373  Capital lease obligations 7,928 - 123  Dividend declared not paid $ - $ - $ 3,152 

Fair Value Of Financial Instr30

Fair Value Of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Of Financial Instruments [Abstract]
Summary Of Financial Assets Measured At Fair Value	  Fair Value Measurements at December 31, 2016  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  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  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      Fair Value Measurements at December 31, 2015  (In thousands) Level 1 Level 2 Level 3 Total Fair Value  Assets:  Cash equivalents:  Money market mutual funds $ 6,746 $ - $ - $ 6,746  Commercial paper - 1,000 - 1,000  Corporate debt securities - 1,055 - 1,055  Total cash equivalents 6,746 2,055 - 8,801  Marketable securities:  Commercial paper - 8,684 - 8,684  Debt securities issued by U.S. Government agencies - 35,155 - 35,155  Corporate debt securities - 44,972 - 44,972  Total marketable securities - 88,811 - 88,811  Total financial assets $ 6,746 $ 90,866 $ - $ 97,612  
Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt	  December 31, 2016 December 31, 2015  (In thousands) Carrying Value Fair Value (Level 2) Carrying Value Fair Value (Level 2)  Credit Facility $ 337,102 $ 304,571 $ 343,710 $ 298,400  8% Notes 123,471 133,965 120,393 132,028  Capital lease obligations 7,842 7,842 2,597 2,597 

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings (Loss) Per Share [Abstract]
Schedule Of Computation Of Basic And Diluted Earnings (Loss) Per Share	  (In thousands, except per share amounts) 2016 2015 2014  Numerator:  Net (loss) income attributable to Lumos Networks Corp. $ (523) $ 10,026 $ 21,528  Less: net income attributable to Lumos Networks Corp. allocable to participating securities - (338) (540)  Numerator for basic and diluted (loss) earnings per common share (523) 9,688 20,988   Denominator:  Weighted average basic shares outstanding 23,370 22,825 22,328  Less: weighted average participating securities and nonvested performance-based restricted shares (813) (791) (581)  Denominator for basic (loss) earnings per common share 22,557 22,034 21,747  Plus: potentially dilutive stock options - 275 363  Denominator for diluted (loss) earnings per common share 22,557 22,309 22,110   Basic (loss) earnings per share $ (0.02) $ 0.44 $ 0.97   Diluted (loss) earnings per share $ (0.02) $ 0.43 $ 0.95 

Stock Options, Restricted Sto32

Stock Options, Restricted Stock and Stock Warrants (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments And Stock Warrant [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	  Year Ended December 31, 2015 Year Ended December 31, 2014  Risk-free interest rate 1.90% 1.96%  Expected volatility 55.93% 59.52%  Expected dividend yield 0.00% 3.54%  Expected term 6.3 years 6.1 years 
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, 2015 2,182 $ 12.57  Granted during the period - -  Exercised during the period (123) 12.59  Forfeited during the period (35) 13.96  Expired during the period (275) 13.78  Stock options outstanding at December 31, 2016 1,749 $ 12.35 5.2 years $ 6,279   Stock options exercisable at December 31, 2016 1,325 $ 12.17 4.9 years $ 4,997  Total stock options outstanding, vested and expected to vest  at December 31, 2016 1,727 $ 12.36 $ 6,180 
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, 2015 861 $ 14.37  Granted during the period 324 12.17  Vested during the period (240) 12.46  Forfeited during the period (96) 15.91  Restricted stock outstanding at December 31, 2016 849 $ 13.85 
Summary of Fair Value Assumptions, Warrants	  Risk-free interest rate 1.61 %  Expected volatility 41.53 %  Expected dividend yield 0 %  Expected term 5 years 
Summary of Warrant Activity	  (In thousands, except per share amounts) Shares Weighted Average Exercise Price per Share  Stock warrants outstanding at December 31, 2015 5,500 $ 13.99  Granted during the period - -  Exercised during the period - -  Expired during the period - -  Stock warrants outstanding at December 31, 2016 5,500 $ 13.99 

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Taxes [Abstract]
Schedule Of Components Of Income Tax Expense (Benefit)	  (In thousands) 2016 2015 2014  Current tax expense (benefit):  Federal $ - $ - $ -  State 411 379 (68)  Total current tax expense (benefit) 411 379 (68)   Deferred tax expense:  Federal 1,341 6,319 11,908  State 210 448 2,569  Total deferred tax expense 1,551 6,767 14,477  Total income tax expense $ 1,962 $ 7,146 $ 14,409 
Schedule Of Effective Income Tax Rate Reconciliation	  (In thousands) 2016 2015 2014  Computed tax expense at federal statutory  rate of 35% $ 567 $ 6,065 $ 12,620  Nondeductible compensation 532 122 27  Noncontrolling interests (69) (61) (47)  Nondeductible public offering costs - 112 -  State income taxes, net of federal income  tax impact 403 538 1,626  Nondeductible interest on 8% Notes 28 578 -  Other, net 501 (208) 183  Total income tax expense $ 1,962 $ 7,146 $ 14,409 
Schedule Of Net Deferred Tax Assets And Liabilities	  (In thousands) 2016 2015  Deferred income tax assets:  Retirement benefits other than pension $ 2,181 $ 2,167  Pension and related plans 4,159 4,588  Net operating loss 26,704 16,509  Accrued expenses 7,096 6,848  Interest and discount on 8% Notes 809 -  Other 546 425  Total deferred income tax assets 41,495 30,537   Deferred income tax liabilities:  Property and equipment (128,515) (111,846)  Intangibles (9,968) (7,884)  Total deferred income tax liabilities (138,483) (119,730)  Net deferred income tax liability $ (96,988) $ (89,193) 
Reconciliation Of Change In Unrecognized Income Tax Benefits	  (In thousands) 2016 2015  Balance at beginning of year $ 1,356 $ 1,112  Additions for tax positions related to the current year 235 297  Increases for tax positions related to prior years (96) 109  Statute of limitations expiration (342) (162)  Balance at end of year $ 1,153 $ 1,356 

Pension Plans And Other Postr34

Pension Plans And Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2016
Pension Plans And Other Postretirement Benefits [Abstract]
Schedule Of Defined Benefit Plan Disclosures	  Defined Benefit Pension Plan Other Postretirement Benefit Plans  (In thousands) Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014  Change in benefit obligations:  Benefit obligations, beginning of period $ 65,725 $ 70,892 $ 57,209 $ 765 $ 844 $ 12,800  Service cost - - - - - 80  Interest cost 2,696 2,664 2,622 30 31 373  Actuarial loss (gain) 763 (4,550) 13,547 22 (83) 887  Benefits paid, net (2,891) (3,281) (2,956) (115) (27) (671)  Curtailment gain - - - - - (12,625)  Transfer - - 470 - - -  Benefit obligations, end of period $ 66,293 $ 65,725 $ 70,892 $ 702 $ 765 $ 844   Change in plan assets:  Fair value of plan assets, beginning of period $ 53,912 $ 58,403 $ 57,847 $ - $ - $ -  Actual return on plan assets 4,606 (1,166) 3,555 - - -  Employer contributions - - - 115 27 671  Benefits paid (2,945) (3,325) (2,999) (115) (27) (671)  Transfer - - - - - -  Fair value of plan assets, end of period $ 55,573 $ 53,912 $ 58,403 $ - $ - $ -   Funded status:  Non-current asset $ - $ - $ - $ - $ - $ -  Current liabilities - - - 56 111 72  Non-current liabilities 10,720 11,813 12,489 646 654 772  Funded status recognized in the consolidated balance sheets $ 10,720 $ 11,813 $ 12,489 $ 702 $ 765 $ 844   Amounts recognized in accumulated other comprehensive loss:  Net actuarial (loss) gain $ (16,598) $ (17,899) $ (18,119) $ 111 $ 18 $ (65)  Income taxes 6,440 6,981 7,066 (43) (7) 25  Net amount recognized in accumulated other comprehensive loss $ (10,158) $ (10,918) $ (11,053) $ 68 $ 11 $ (40) 
Schedule Of Net Periodic (Benefit) Expense	  Defined Benefit Pension Plan Other Postretirement Benefit Plans  (In thousands) Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014  Components of net periodic (benefit) expense:  Service cost $ - $ - $ - $ - $ - $ 80  Interest cost 2,696 2,664 2,622 30 31 373  Expected return on plan assets (3,536) (4,111) (4,373) - - -  Amortization of loss 1,049 991 - - - 23  Net periodic expense (benefit) $ 209 $ (456) $ (1,751) $ 30 $ 31 $ 476 
Schedule Of Assumptions Used	   Defined Benefit Pension Plan Other Postretirement Benefit Plans  December 31, 2016 December 31, 2015 December 31, 2016 December 31, 2015  Discount rate 4.00 % 4.20 % 4.00 % 4.20 %  Rate of compensation increase N/A N/A N/A N/A  The assumptions used in the measurements of the Company’s net income or expense for the consolidated statement s of operations for the years ended December 31, 2016 , 2015 and 2014 were as follows:    Defined Benefit Pension Plan Other Postretirement Benefit Plans  Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014  Discount rate 4.20 % 3.85 % 4.70 % 4.20 % 3.85 % 4.70 %  Expected return on plan assets 6.75 % 7.25 % 7.75 % N/A N/A N/A  Rate of compensation increase N/A N/A N/A N/A N/A N/A 
Schedule Of Plan Asset Allocation	   (Dollars in thousands) December 31, 2016 December 31, 2015  Asset Category Actual Allocation Fair Value Actual Allocation Fair Value  Large Cap Value 23 % $ 12,518 23 % $ 12,193  Large Cap Blend 11 % 6,237 11 % 6,085  Mid Cap Blend 7 % 3,676 6 % 3,342  Small Cap Blend 4 % 2,308 4 % 2,080  Foreign Stock - Large Cap 6 % 3,586 7 % 3,817  Bond 33 % 18,633 34 % 18,239  Cash and cash equivalents 16 % 8,615 15 % 8,156  Total 100 % $ 55,573 100 % $ 53,912  The actual and target allocation for plan assets is broadly defined and measured as follows:    December 31, 2016 December 31, 2015  Asset Category Actual Allocation Target Allocation Actual Allocation Target Allocation  Equity securities 51 % 50 % 51 % 50 %  Bond securities and cash equivalents 49 % 50 % 49 % 50 %  Total 100 % 100 % 100 % 100 % 
Schedule Of Expected Future Pension Benefit Payments	  (In thousands) Year Defined Benefit Pension Plan Other Postretirement Benefit Plans  2017 $ 3,074 $ 57  2018 3,111 57  2019 3,214 56  2020 3,247 55  2021 3,315 54  2022-2026 17,197 245 

Restructuring Charges (Tables)

Restructuring Charges (Tables)	12 Months Ended
	Dec. 31, 2016
Restructuring Charges [Abstract]
Schedule Of Restructuring Costs By Business Segments	  (In thousands) Data R&SB RLEC Access Total  Employee severance and termination benefits $ 1,451 $ 412 $ 77 $ 1,940  Total restructuring charges $ 1,451 $ 412 $ 77 $ 1,940 
Summary Of Restucturing Liability Balance	  (In thousands) Employee Severance and Termination Benefits Total  Beginning balance at December 31, 2015 $ - $ -  Additions, net of adjustment 1,940 1,940  Payments (1,542) (1,542)  Ending balance at December 31, 2016 $ 398 $ 398 

Organization (Details)

Organization (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 14, 2015	Mar. 17, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Feb. 18, 2017
Organization [Abstract]
Common stock, par value			$ 0.01	$ 0.01
Common stock sold by Quadrangle in secondary offering, shares		1,600,000
Sale of Stock, Number of Shares Issued in Transaction	591,898
Sale of Stock, Price Per Share						$ 18
Sale of Stock, Consideration Received on Transaction	$ 0	$ 0
Other nonoperating costs			$ 0	$ 300	$ 0

Summary of Significant Accoun37

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend	$ 0	$ 0
Amortization	2,575,000	4,806,000	$ 9,187,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)	300,000	300,000
Goodwill, Gross	133,700,000	133,700,000
Goodwill, Impaired, Accumulated Impairment Loss	33,400,000	33,400,000
Goodwill	100,297,000	100,297,000
Goodwill, Impairment Loss	0	0
Advertising Expense	$ 900,000	700,000	1,400,000
Number Of Highest ConsecutiveYears Of Compensation Subject To Certain Reductions	5 years
Maximum Retirement Age Reached To Be Subject To Reductions	65 years
Curtailment gain			(10,774,000)
Contribution vesting period	2 years
Equity-based compensation, exclusive of restructuring charges	$ 9,581,000	5,881,000
Future Charges For Equity-Based Compensation 2017	3,500,000
Future Charges For Equity-Based Compensation 2018	1,700,000
Future Charges For Equity-Based Compensation 2019	400,000
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan, Contributions by Employer	$ 115,000	$ 27,000	$ 671,000
Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent	5.00%
Future Charges For Equity-Based Compensation 2020	$ 100,000
Future Charges For Equity Based Compensation 2021	$ 100,000
Minimum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent	1.00%

Summary of Significant Accoun38

Summary of Significant Accounting Policies (Schedule Of Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Allowance for doubtful accounts and customer credits, beginning	$ 1,235	$ 1,217	$ 1,485
Charged to Expense	236	461	604
(Deducted from) charged to other Accounts	(97)	96	(19)
Deductions	(432)	(539)	(853)
Allowance for doubtful accounts and customer credits, ending	$ 942	1,235	1,217
Valuation Allowances and Reserves, Balance		$ 1,235	$ 1,217

Summary of Significant Accoun39

Summary of Significant Accounting Policies (Estimated Useful Lives) (Details)	12 Months Ended
	Dec. 31, 2016
Telephony Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives	50
Telephony Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives	3
Land, Buildings and Improvements [Member]
Property, Plant and Equipment, Estimated Useful Lives	50
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives	24
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives	4

Summary of Significant Accoun40

Summary of Significant Accounting Policies (Finite-Lived Intangibles Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross amount	$ 105,970	$ 105,970
Accumulated Amortization	(97,467)	(94,892)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	103,108	103,108
Accumulated Amortization	(95,463)	(93,051)
Trademarks And Franchise Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross amount	2,862	2,862
Accumulated Amortization	$ (2,004)	$ (1,841)
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	10 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

Summary of Significant Accoun41

Summary of Significant Accounting Policies (Schedule Of Future Amortization Expense) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Finite-Lived Intangible Assets [Line Items]
2,017	$ 2,256
2,018	1,944
2,019	1,665
2,020	1,194
2,021	1,112
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
2,017	2,093
2,018	1,781
2,019	1,513
2,020	1,146
2,021	1,112
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
2,017	163
2,018	163
2,019	152
2,020	$ 48

Summary of Significant Accoun42

Summary of Significant Accounting Policies (Schedule Of Changes In Asset Retirement Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Asset retirement obligations, beginning	$ 1,720	$ 1,500
Additional asset retirement obligations recorded, net of adjustments in estimates		81
Accretion of asset retirement obligations	115	139	$ 118
Asset retirement obligations, ending	$ 1,835	$ 1,720	$ 1,500

Summary of Significant Accoun43

Summary of Significant Accounting Policies (Schedule Of Goodwill Attributed To Segments) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Total goodwill	$ 100,297	$ 100,297
Data [Member]
Goodwill [Line Items]
Total goodwill	90,561
R&SB [Member]
Goodwill [Line Items]
Total goodwill	$ 9,736

Cash Equivalents And Marketab44

Cash Equivalents And Marketable Securities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total proceeds from the sale or maturity of available-for-sale marketable securities	$ 125,041	$ 42,200	$ 40,679
Maximum [Member]
Net unrealized holding gains on available-for-sale securities	$ 100	$ 100

Cash Equivalents And Marketab45

Cash Equivalents And Marketable Securities (Schedule Of Cash Equivalents And Available-For-Sale Marketable Securities Reported At Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	$ 7,155	$ 8,801
Total marketable securities, available-for-sale	38,081	88,811
Total cash equivalents and marketable securities	45,236	97,612
Money Market Mutual Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	6,742	6,746
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents	413	1,055
Commercial Paper ST [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents		1,000
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale	7,370	8,684
Variable Rate Demand Obligation [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale	13,995
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale	$ 16,716	44,972
Debt Securities issued by U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Total marketable securities, available-for-sale		$ 35,155

Cash Equivalents And Marketab46

Cash Equivalents And Marketable Securities (Schedule Of Contractual Maturities Of Available-For-Sale Debt Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Cash Equivalents And Marketable Securities [Abstract]
Due in one year or less	$ 24,086
Due after five years through ten years	4,695
Due after ten years	9,300
Total debt securities	$ 38,081	$ 88,811

Disclosures About Segments of47

Disclosures About Segments of an Enterprise and Related Information (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax					$ (10,774)
AT&T [Member]
Segment Reporting Information [Line Items]
Percentage to total revenue		7.00%		7.00%	10.00%
Top Five Customers [Member]
Segment Reporting Information [Line Items]
Percentage to total revenue		32.00%		31.00%	31.00%
Data [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[2]	$ 56,018	[1]	$ 50,719	$ 46,699	[1]
R&SB [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[2]	21,717	[1]	21,426	23,480	[1]
RLEC Access [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[2]	$ 17,355	[1]	$ 19,858	19,685	[1]
Corporate (Unallocated) [Member]
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation And Amortization	[1],[2]				$ 10,774
[1]	Adjusted EBITDA (a non-GAAP measure), 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 or loss attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, employee separation charges, restructuring-related charges, acquisition and separation related charges, gain or loss on settlements and gain or loss on interest rate swap derivatives. See Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations for additional disclosures regarding Adjusted EBITDA
[2]	In 2016, the Company refined its methodology for allocating certain operating costs to the segments, resulting in immaterial changes to previously reported segment Adjusted EBITDA amounts for the years ended December 31, 2015 and 2014.

Disclosures About Segments of48

Disclosures About Segments of an Enterprise and Related Information (Summarized Financial Information Of Reportable Segments) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Operating Revenues		$ 206,899		$ 204,269	$ 201,456
Cost of revenue		38,973		42,205	42,978
Direct operating and selling costs		12,800		10,590	10,022
Indirect operating costs		36,421		35,590	34,580
Corporate general and administrative costs		35,757		31,112	18,071
Capital expenditures		84,027		115,675	84,100
Data [Member]
Segment Reporting Information [Line Items]
Operating Revenues		123,604		114,311	106,642
Cost of revenue		17,909		17,934	16,767
Gross profit		105,695		96,377	89,875
Direct operating and selling costs		7,489		5,403	4,755
Indirect operating costs		26,717		25,322	24,194
Corporate general and administrative costs		15,471		14,933	14,227
Adjusted EBITDA	[2]	56,018	[1]	50,719	46,699	[1]
Capital expenditures		73,328		98,535	66,570
R&SB [Member]
Segment Reporting Information [Line Items]
Operating Revenues		63,328		67,214	72,028
Cost of revenue		21,064		24,271	26,211
Gross profit		42,264		42,943	45,817
Direct operating and selling costs		4,658		4,521	4,600
Indirect operating costs		9,494		10,043	10,077
Corporate general and administrative costs		6,395		6,953	7,660
Adjusted EBITDA	[2]	21,717	[1]	21,426	23,480	[1]
Capital expenditures		10,050		9,545	7,089
RLEC Access [Member]
Segment Reporting Information [Line Items]
Operating Revenues		19,967		22,744	22,786
Gross profit		19,967		22,744	22,786
Direct operating and selling costs		653		666	667
Indirect operating costs		210		225	309
Corporate general and administrative costs		1,749		1,995	2,125
Adjusted EBITDA	[2]	17,355	[1]	19,858	19,685	[1]
Corporate (Unallocated) [Member]
Segment Reporting Information [Line Items]
Corporate general and administrative costs		12,142		7,231	(5,942)
Adjusted EBITDA	[1],[2]				10,774
Capital expenditures		$ 649		$ 7,595	$ 10,441
[1]	Adjusted EBITDA (a non-GAAP measure), 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 or loss attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, employee separation charges, restructuring-related charges, acquisition and separation related charges, gain or loss on settlements and gain or loss on interest rate swap derivatives. See Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations for additional disclosures regarding Adjusted EBITDA
[2]	In 2016, the Company refined its methodology for allocating certain operating costs to the segments, resulting in immaterial changes to previously reported segment Adjusted EBITDA amounts for the years ended December 31, 2015 and 2014.

Disclosures About Segments of49

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		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total reportable segments measure of profit		$ 95,090		$ 92,003	$ 100,638
Interest expense		(28,385)		(19,918)	(15,575)
Gain on interest rate swap derivatives				665	492
Other (income) expenses, net		389		114	664
Depreciation and amortization and accretion of asset retirement obligations		(51,394)		(47,666)	(45,330)
Amortization of actuarial losses		(1,350)		(1,350)	(248)
Equity-based compensation, exclusive of restructuring charges		(9,581)		(5,881)
Restructuring charges		(1,940)		(638)
Acquisition and Separation Related Charges		(1,211)
Income Before Income Taxes		1,618		17,329	36,057
Data [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[2]	56,018	[1]	50,719	46,699	[1]
Restructuring charges		(1,451)
R&SB [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[2]	21,717	[1]	21,426	23,480	[1]
Restructuring charges		(412)
RLEC Access [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[2]	17,355	[1]	$ 19,858	19,685	[1]
Restructuring charges		$ (77)
Corporate (Unallocated) [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA	[1],[2]				10,774
Amortization of actuarial losses					(248)
Equity-based compensation, exclusive of restructuring charges					(4,340)
Employee separation charges					$ 244
[1]	Adjusted EBITDA (a non-GAAP measure), 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 or loss attributable to noncontrolling interests, other income or expenses, equity-based compensation charges, amortization of actuarial losses on retirement plans, employee separation charges, restructuring-related charges, acquisition and separation related charges, gain or loss on settlements and gain or loss on interest rate swap derivatives. See Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations for additional disclosures regarding Adjusted EBITDA
[2]	In 2016, the Company refined its methodology for allocating certain operating costs to the segments, resulting in immaterial changes to previously reported segment Adjusted EBITDA amounts for the years ended December 31, 2015 and 2014.

Long-Term Debt (Narrative) (Det

Long-Term Debt (Narrative) (Details)	Aug. 06, 2015USD ($)shares	Jan. 02, 2015USD ($)	Apr. 30, 2013USD ($)	Dec. 31, 2016USD ($)itemshares	Dec. 31, 2015USD ($)shares	Dec. 31, 2014USD ($)	Dec. 31, 2012
Line of credit borrowing capacity			$ 425,000,000
Amount outstanding retired			311,000,000
Principal payments on senior secured term loans				$ 8,030,000	$ 47,960,000	$ 5,250,000
Line of credit, interest coverage ratio, minimum | item				3.25
Line Of Credit Percentage Of Excess Cash Flow Equal To Excess Cash Flow Sweep Included In Mandatory Prepayments				50.00%
Leverage and interest coverage ratio				The Company was in compliance with its debt covenants as of December 31, 2016
Leverage and interest coverage ratio requirements				The amended Credit Facility includes various restrictions and conditions, including a maximum leverage ratio of 4.75:1.00 through December 31, 2016, 4.50:1.00 through December 31, 2017, 4.25:1.00 through December 31, 2018 and 4.00:1.00 thereafter. The Credit Facility also sets a minimum interest rate coverage ratio of 3.25:1.00
Line of credit, leverage ratio | item				3.68
Line of credit, interest coverage ratio | item				7.27
Fixed interest rate						0.80%	0.50%
Gain Loss On Interest Rate Derivative Instruments Not Designated As Hedging Instruments					665,000	$ 492,000
Payment of financing costs					$ 8,192,000
Granted during the period, shares | shares	5,500,000				5,500,000
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
Amortization of debt discount and issuance costs				$ 4,500,000	$ 2,688,000	1,461,000
Amortization of debt issuance costs				$ 4,500,000	2,700,000	1,500,000
Patronage refunds percentage, cash				75.00%
Patronage refunds percentage, equity				25.00%
Patronage credits				$ 1,000,000	$ 1,200,000	$ 700,000
Line of credit, percentage of excess cash flow equal to excess cash flow sweep included in mandatory prepayments				50.00%
Line of credit, leverage ratio, minimum for mandatory prepayments to include excess cash flow sweep | item				3.25
Maturities of long-term debt, 2017				$ 500,000
Future minimum lease payments				7,800,000
Future minimum lease payments, 2018				500,000
Future minimum lease payments, 2019				400,000
Future minimum lease payments, 2020				400,000
Future minimum lease payments, 2021				400,000
Future minimum lease payments, thereafter				$ 5,600,000
January 1, 2016 Through December 31, 2016
Line of credit, leverage ratio, maximum | item				4.75
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
Term of loan				5 years
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] | September 30, 2014 Through December 31, 2016 [Member]
Quarterly payments per annum				1.25%
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				3.95%
Maturities of long-term debt, 2018				$ 13,000,000
Maturities of long-term debt, 2019				70,900,000
Maturities of long-term debt, 2019				$ 256,500,000
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%
Debt issuance costs		$ 900,000
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 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	Dec. 31, 2016	Dec. 31, 2015
Less: current portion of long term debt	$ 13,530	$ 10,400
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	454,885	456,300
Long-term Debt [Member]
Credit facility	340,385	348,415
8% Notes	150,000	150,000
Capital lease obligations	7,842	2,597
Long-term debt	498,227	501,012
Less: current portion of long term debt	13,530	10,400
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	484,697	490,612
Unamortized Discount and Debt Issuance Costs [Member]
Credit facility	3,283	4,705
8% Notes	26,529	29,607
Long-term debt	29,812	34,312
Long-term debt, net of unamortized discount and debt issuance costs, excluding current portion	$ 29,812	$ 34,312

Long-Term Debt (Schedule of Cap

Long-Term Debt (Schedule of Capitalized Lease Assets) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Vehicles [Member]
Historical cost	$ 2,723
Accumulated amortization	(1,755)
Telephony Equipment [Member]
Historical cost	8,871
Accumulated amortization	(444)
Assets Held under Capital Leases [Member]
Historical cost	11,594
Accumulated amortization	$ (2,199)

Supplementary Disclosures Of 53

Supplementary Disclosures Of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplementary Disclosures Of Cash Flow Information [Abstract]
Interest (net of amounts capitalized)	$ 23,873	$ 15,467	$ 13,206
Income taxes	395	843	(680)
Additions to property, plant and equipment included in accounts payable and other accrued liabilities	2,750	6,906	8,373
Capital lease obligations	7,928		123
Dividends declared on common stock not paid			3,152
Cash received from patronage credits	800	800	900
Interest capitalized	$ 1,000	$ 1,200	$ 300

Fair Value Of Financial Instr54

Fair Value Of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost Method Investments	$ 1,479	$ 1,180
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	$ 1,100

Fair Value Of Financial Instr55

Fair Value Of Financial Instruments (Summary Of Financial Assets Measured At Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	$ 7,155	$ 8,801
Total marketable securities	38,081	88,811
Total financial assets	45,236	97,612
Money Market Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	6,742	6,746
Commercial Paper ST [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents		1,000
Variable Rate Demand Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	13,995
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	7,370	8,684
Debt Securities issued by U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities		35,155
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	413	1,055
Total marketable securities	16,716	44,972
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	6,742	6,746
Total financial assets	6,742	6,746
Level 1 [Member] | Money Market Mutual Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	6,742	6,746
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	413	2,055
Total marketable securities	38,081	88,811
Total financial assets	38,494	90,866
Level 2 [Member] | Commercial Paper ST [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents		1,000
Level 2 [Member] | Variable Rate Demand Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	13,995
Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities	7,370	8,684
Level 2 [Member] | Debt Securities issued by U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable securities		35,155
Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	413	1,055
Total marketable securities	$ 16,716	$ 44,972

Fair Value Of Financial Instr56

Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit facility	$ 337,102	$ 343,710
8% Notes	123,471	120,393
Capital lease obligations	7,842	2,597
Fair Value (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit facility	304,571	298,400
8% Notes	133,965	132,028
Capital lease obligations	$ 7,842	$ 2,597

Earnings (Loss) Per Share (Narr

Earnings (Loss) Per Share (Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded from computation of diluted earnings per common share	984,144	740,214	598,463
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded from computation of diluted earnings per common share	526,957	24,000	17,383
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	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings (Loss) Per Share [Abstract]
Net (loss) income attributable to Lumos Networks Corp.	$ (523)	$ 10,026	$ 21,528
Less: net income attributable to Lumos Networks Corp. allocable to participating securities		(338)	(540)
Numerator for basic and diluted (loss) earnings per common share	$ (523)	$ 9,688	$ 20,988
Weighted average basic shares outstanding	23,370	22,825	22,328
Less: weighted average participating securities and nonvested performance-based restricted shares	(813)	(791)	(581)
Denominator for basic (loss) earnings per common share	22,557	22,034	21,747
Plus: potentially dilutive restricted shares and stock options		275	363
Denominator for diluted (loss) earnings per common share	22,557	22,309	22,110
Basic (loss) earnings per share	$ (0.02)	$ 0.44	$ 0.97
Diluted (loss) earnings per share	$ (0.02)	$ 0.43	$ 0.95

Stock Options, Restricted Sto59

Stock Options, Restricted Stock and Stock Warrants (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 06, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options issued		0
Number of shares issued during the period		324,000
Stock options to be granted, minimum exercise price as a percentage of grant date fair value		100.00%
Stock options grants, maximum life, in years		10 years
Weighted-average grant date fair value per share of stock options granted			$ 8.09	$ 6.68
Total intrinsic value of stock options exercised		$ 0.2	$ 0.1	$ 0.3
Total fair value of options vested		0.8	$ 1.3	0.5
Unrecognized compensation cost		$ 0.8
Unrecognized compensation cost recognition period, in years		1 year 6 months
Shares available for employee stock purchase plan		100,000
Remaining shares available for employee stock purchase plan		61,657
Shares price percentage		85.00%
Shares issued under the employee stock purchase plan		6,126
Warrants issued, shares	5,500,000		5,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 13.99
GrantDateFairValueofWarrants	$ 4.44
Proceeds from Issuance of Warrants	$ 23.5
Portion of Debt Discount offset from proceeds allocated to warrants	$ 1.3
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan vesting description		Options issued to employees with service-only conditions generally vest on a graded vesting schedule over a four to five year period.
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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 restricted stock awards vest on a graded vesting schedule over a five year period.
Vesting schedule		5 years
Total fair value of options vested		$ 3	$ 1.7	1.7
Unrecognized compensation cost		$ 4.7
Unrecognized compensation cost recognition period, in years		1 year 9 months 18 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
Securities remained available for issuance		901,558
Equity And Cash Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued during the period		323,804
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for options issued to employees with service-only conditions		4 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for options issued to employees with service-only conditions		5 years
Compensation expense associated with employee stock purchase plan			$ 0.1	$ 0.1	$ 0.1

Stock Options, Restricted Sto60

Stock Options, Restricted Stock and Stock Warrants (Schedule Of Valuation Assumptions) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Stock Plans [Abstract]
Risk-free interest rate	1.90%	1.96%
Expected volatility	55.93%	59.52%
Expected dividend yield	0.00%	3.54%
Expected term	6 years 3 months 20 days	6 years 1 month 6 days

Stock Options, Restricted Sto61

Stock Options, Restricted Stock and Stock Warrants (Summary Of Stock Options Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)$ / sharesshares
Stock Plans [Abstract]
Stock options outstanding at December 31, 2015, Shares	2,182
Stock options outstanding at December 31, 2015, Weighted-Average Exercise Price per Share | $ / shares	$ 12.57
Granted during the period, Shares	0
Exercised during the period, Shares	(123)
Exercised during the period, Weighted-Average Exercise Price per Share | $ / shares	$ 12.59
Forfeited during the period, Shares	(35)
Forfeited during the period, Weighted-Average Exercise Price per Share | $ / shares	$ 13.96
Expired during the period, Shares	(275)
Expired during the period, Weighted Average Exercise Price per Share | $ / shares	$ 13.78
Stock options outstanding at December 31, 2016, Shares	1,749
Stock options outstanding at December 31, 2016, Weighted-Average Exercise Price per Share | $ / shares	$ 12.35
Stock options outstanding at December 31, 2016, Weighted-Average Remaining Contractual Term, in years	5 years 2 months 13 days
Stock options outstanding a December 31, 2016, Aggregate Intrinsic Value | $	$ 6,279
Stock options exercisable at December 31, 2016, Shares	1,325
Stock options exercisable at December 31, 2016, Weighted-Average Exercise Price per Share | $ / shares	$ 12.17
Stock options exercisable at December 31, 2016, Weighted-Average Remaining Contractual Term, in years	4 years 10 months 29 days
Stock options exercisable at December 31, 2016, Aggregate Intrinsic Value | $	$ 4,997
Total stock options outstanding, vested and expected to vest at December 31, 2016, Shares	1,727
Total stock options outstanding, vested and expected to vest at December 31, 2016, Weighted-Average Exercise Price per Share | $ / shares	$ 12.36
Total stock options outstanding, vested and expected to vest at December 31, 2016, Aggregate Intrinsic Value | $	$ 6,180

Stock Options, Restricted Sto62

Stock Options, Restricted Stock and Stock Warrants (Summary Of Restricted Stock Awards Activity) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock outstanding at December 31, 2015, Shares | shares	861
Stock outstanding at December 31, 2015, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 14.37
Granted during the period, Shares | shares	324
Granted during the period, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 12.17
Vested during the period, Shares | shares	(240)
Vested during the period, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 12.46
Forfeited during the period, Shares | shares	(96)
Forfeited during the period, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 15.91
Restricted stock outstanding at September 30, 2016, Shares | shares	849
Stock outstanding at December 31, 2016, Weighted Average Grant Date Fair Value per Share | $ / shares	$ 13.85

Stock Options, Restricted Sto63

Stock Options, Restricted Stock and Stock Warrants (Grant Date Fair Value of Warrants estimated using Black-Scholes Option Pricing Model and Assumptions) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate		1.90%	1.96%
Expected volatility		55.93%	59.52%
Expected dividend yield		0.00%	3.54%
Expected term		6 years 3 months 20 days	6 years 1 month 6 days
Stock Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.61%
Expected volatility	41.53%
Expected dividend yield	0.00%
Expected term	5 years

Stock Options, Restricted Sto64

Stock Options, Restricted Stock and Stock Warrants (Summary of Stock Warrant Activity) (Details) - $ / shares	Aug. 06, 2015	Dec. 31, 2016	Dec. 31, 2015
Warrants and Rights Note Disclosure [Abstract]
Stock warrants oustanding at December 31, 2015, Shares		5,500,000
Stock warrants outstanding at December 31, 2015, weighted average exercise price per share		$ 13.99
Granted during the period, shares	5,500,000		5,500,000
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 December 31, 2016, Shares		5,500,000	5,500,000
Stock warrants outstanding at December 31, 2016, weighted average exercise price		$ 13.99	$ 13.99

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax [Line Items]
Adjustments to excess tax benefit from stock-based compensation	$ (172)	$ 165	$ (1,488)
Tax expense (benefit) for adjustments to pension and postretirement benefit plans in other comprehensive income	600	$ 400	$ 5,400
Adjustment for deferred taxes upon issuance of 8% Notes	(5,486)
Federal [Member]
Income Tax [Line Items]
Net operating losses	$ 69,300
Minimum [Member]
Income Tax [Line Items]
NOL expiration range	2,022
Maximum [Member]
Income Tax [Line Items]
NOL expiration range	2,036

Income Taxes (Schedule Of Compo

Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Federal
State	411	379	(68)
Total current tax expense (benefit)	411	379	(68)
Deferred tax expense, Federal	1,341	6,319	11,908
Deferred tax expense, State	210	448	2,569
Total deferred tax expense	1,551	6,767	14,477
Total income tax expense	$ 1,962	$ 7,146	$ 14,409

Income Taxes (Schedule Of Effec

Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Computed tax expense at statutory federal rate of 35%	$ 567	$ 6,065	$ 12,620
Nondeductible compensation	532	122	27
Noncontrolling interests	(69)	(61)	(47)
Nondeductible public offering costs		112
State income taxes, net of federal income tax impact	403	538	1,626
Nondeductible interest on 8% Notes	28	578
Other, net	501	(208)	183
Total income tax expense	$ 1,962	$ 7,146	$ 14,409
Statutory federal rate	35.00%	35.00%	35.00%

Income Taxes (Schedule Of Net D

Income Taxes (Schedule Of Net Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Retirement benefits other than pension	$ 2,181	$ 2,167
Pension and related plans	4,159	4,588
Net operating loss	26,704	16,509
Accrued expenses	7,096	6,848
Interest and discount on 8% Notes	809
Other	546	425
Total deferred income tax assets	41,495	30,537
Property and equipment	(128,515)	(111,846)
Intangibles	(9,968)	(7,884)
Total deferred income tax liabilities	(138,483)	(119,730)
Net non-current deferred income tax liability	(96,988)	(89,193)
Net deferred income tax liability	$ 96,988	$ 89,193

Income Taxes (Reconciliation Of

Income Taxes (Reconciliation Of Change In Unrecognized Income Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Balance at beginning of year	$ 1,356	$ 1,112
Additions for tax positions related to the current year	235	297
Increases for tax positions related to prior years	(96)	109
Statute of limitations expiration	(342)	(162)
Balance at end of year	$ 1,153	$ 1,356

Pension Plans And Other Postr70

Pension Plans And Other Postretirement Benefits (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Total expense (income) recognized for all pension and OPEBs plans	$ 505,000	$ (314,000)	$ (1,628,000)
Further benefits that will be accrued by plan participants	0
Other Comprehensive Income (Loss), Finalization of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax			(10,774,000)
Income tax from unrecognized actuarial loss	600,000
Company matching contribution for a defined contribution plan	1,100,000	1,100,000	1,000,000
Qualified And Non-Qualified Pension And OPEBs Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Total expense (income) recognized for all pension and OPEBs plans	(700,000)	(1,300,000)	(1,100,000)
Expense recognized from previously unrecognized loss	900,000	$ 100,000
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax	$ 500,000
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	4.20%
Expected net periodic (benefit) expense	$ 600,000
Benefit obligation	66,293,000	$ 65,725,000	70,892,000	$ 57,209,000
Income tax from unrecognized actuarial loss	(6,440,000)	$ (6,981,000)	(7,066,000)
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	0
Expected future benefit payments, 2017	3,074,000
Expected future benefit payments, 2018	3,111,000
Expected future benefit payments, 2019	3,214,000
Expected future benefit payments, 2020	3,247,000
Expected future benefit payments, 2021	3,315,000
Expected future benefit payments, 2022-2026	$ 17,197,000
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	4.20%
Benefit obligation	$ 702,000	$ 765,000	844,000	$ 12,800,000
Income tax from unrecognized actuarial loss	43,000	7,000	(25,000)
Defined Benefit Plan, Contributions by Employer	115,000	27,000	671,000
Expected future benefit payments, 2017	57,000
Expected future benefit payments, 2018	57,000
Expected future benefit payments, 2019	56,000
Expected future benefit payments, 2020	55,000
Expected future benefit payments, 2021	54,000
Expected future benefit payments, 2022-2026	245,000
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Further benefits that will be accrued by plan participants	0
Benefit obligation	4,800,000	4,600,000	4,900,000
Expense recognized from previously unrecognized loss	200,000	400,000	$ 200,000
Amount of unrecognized actuarial losses recorded in AOCI	900,000	1,000,000
Income tax from unrecognized actuarial loss		600,000
Expected future benefit payments, 2017	200,000
Expected future benefit payments, 2018	200,000
Expected future benefit payments, 2019	200,000
Expected future benefit payments, 2020	300,000
Expected future benefit payments, 2021	300,000
Expected future benefit payments, 2022-2026	1,400,000
Maximum [Member] | Qualified And Non-Qualified Pension And OPEBs Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Tax		$ 100,000
Maximum [Member] | Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected net periodic (benefit) expense	$ 100,000

Pension Plans And Other Postr71

Pension Plans And Other Postretirement Benefits (Schedule Of Defined Benefit Plan Disclosures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in plan assets:
Fair value of plan assets, beginning of period	$ 53,912
Fair value of plan assets, end of period	55,573	$ 53,912
Funded status:
Non-current liabilities	16,029	17,029
Amounts recognized in accumulated other comprehensive loss:
Income taxes	(600)
Defined Benefit Pension Plan [Member]
Change in benefit obligations:
Benefit obligations, beginning of period	65,725	70,892	$ 57,209
Interest cost	2,696	2,664	2,622
Actuarial loss (gain)	763	(4,550)	13,547
Benefits paid, net	(2,891)	(3,281)	(2,956)
Curtailment gain
Transfer			470
Benefit obligations, end of period	66,293	65,725	70,892
Change in plan assets:
Fair value of plan assets, beginning of period	53,912	58,403	57,847
Actual return on plan assets	4,606	(1,166)	3,555
Benefits paid	(2,945)	(3,325)	(2,999)
Fair value of plan assets, end of period	55,573	53,912	58,403
Funded status:
Current liabilities
Non-current liabilities	10,720	11,813	12,489
Funded status recognized in the consolidated balance sheets	10,720	11,813	12,489
Amounts recognized in accumulated other comprehensive loss:
Net actuarial loss	(16,598)	(17,899)	(18,119)
Income taxes	6,440	6,981	7,066
Net amount recognized in accumulated other comprehensive loss	(10,158)	(10,918)	(11,053)
Other Postretirement Benefit Plans [Member]
Change in benefit obligations:
Benefit obligations, beginning of period	765	844	12,800
Service cost			80
Interest cost	30	31	373
Actuarial loss (gain)	22	(83)	887
Benefits paid, net	(115)	(27)	(671)
Curtailment gain			(12,625)
Transfer
Benefit obligations, end of period	702	765	844
Change in plan assets:
Employer contributions	115	27	671
Benefits paid	(115)	(27)	(671)
Funded status:
Current liabilities	56	111	72
Non-current liabilities	646	654	772
Funded status recognized in the consolidated balance sheets	702	765	844
Amounts recognized in accumulated other comprehensive loss:
Net actuarial loss	111	18	(65)
Income taxes	(43)	(7)	25
Net amount recognized in accumulated other comprehensive loss	$ 68	$ 11	$ (40)

Pension Plans And Other Postr72

Pension Plans And Other Postretirement Benefits (Schedule Of Net Periodic (Benefit) Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 2,696	$ 2,664	$ 2,622
Expected return on plan assets	(3,536)	(4,111)	(4,373)
Amortization of loss	1,049	991
Net periodic benefit expense (benefit)	209	(456)	(1,751)
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost			80
Interest cost	30	31	373
Amortization of loss			23
Net periodic benefit expense (benefit)	$ 30	$ 31	$ 476

Pension Plans And Other Postr73

Pension Plans And Other Postretirement Benefits (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	4.20%
Discount rate	4.20%	3.85%	4.70%
Expected return on plan assets	6.75%	7.25%	7.75%
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	4.20%
Discount rate	4.20%	3.85%	4.70%

Pension Plans And Other Postr74

Pension Plans And Other Postretirement Benefits (Schedule Of Plan Asset Allocation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	100.00%	100.00%
Fair Value	$ 55,573	$ 53,912
Target Allocation	100.00%	100.00%
Large Cap Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	23.00%	23.00%
Fair Value	$ 12,518	$ 12,193
Large Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	11.00%	11.00%
Fair Value	$ 6,237	$ 6,085
Mid Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	7.00%	6.00%
Fair Value	$ 3,676	$ 3,342
Small Cap Blend [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	4.00%	4.00%
Fair Value	$ 2,308	$ 2,080
Foreign Stock - Large Cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	6.00%	7.00%
Fair Value	$ 3,586	$ 3,817
Bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	33.00%	34.00%
Fair Value	$ 18,633	$ 18,239
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	16.00%	15.00%
Fair Value	$ 8,615	$ 8,156
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	51.00%	51.00%
Target Allocation	50.00%	50.00%
Bond Securities And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Allocation	49.00%	49.00%
Target Allocation	50.00%	50.00%

Pension Plans And Other Postr75

Pension Plans And Other Postretirement Benefits (Schedule Of Expected Future Pension Benefit Payments) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	$ 3,074
2,018	3,111
2,019	3,214
2,020	3,247
2,021	3,315
2022-2026	17,197
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	57
2,018	57
2,019	56
2,020	55
2,021	54
2022-2026	$ 245

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) - Equity Method Investee [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 1,200	$ 1,200	$ 900
Related Party Transaction, Other Revenues from Transactions with Related Party	4,400	4,700	$ 5,000
Due from Related Party	$ 400	$ 400

Restructuring Charges (Schedule

Restructuring Charges (Schedule Of Restructuring Costs By Business Segments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Employee severance and termination benefits	$ 1,940
Total Restructuring charges	1,940	$ 638
Data [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and termination benefits	1,451
Total Restructuring charges	1,451
R&SB [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and termination benefits	412
Total Restructuring charges	412
RLEC Access [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and termination benefits	77
Total Restructuring charges	$ 77

Restructuring Charges (Summary

Restructuring Charges (Summary Of Restructuring Liability Balance) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Restructuring Cost and Reserve [Line Items]
Additions, net of adjustment	$ 1,940
Payments	(1,542)
Ending balance at December 31, 2016	398
Employee Severance And Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Additions, net of adjustment	1,940
Payments	(1,542)
Ending balance at December 31, 2016	$ 398

Commitments And Contingencies (

Commitments And Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments And Contingencies [Abstract]
Rental expense for operating leases	$ 12.1	$ 12	$ 10.2
Amount committed under lease agreements, 2017	3.6
Amount committed under lease agreements, 2018	3
Amount committed under lease agreements, 2019	2.3
Amount committed under lease agreements, 2020	1.2
Amount committed under lease agreements, 2021	0.7
Amount committed under lease agreements, thereafter	1.5
Purchase commitments relating to capital expenditures	$ 2.8

Subsequent Event (Details)

Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Millions	Feb. 18, 2017	Jan. 31, 2017	Jan. 04, 2017
Business Acquisition, Name of Acquired Entity		DC74 LLC	Clarity Communications, LLC
Sale of Stock, Description of Transaction	On February 18, 2017, we 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 we will be acquired by EQT Infrastructure investment strategy ("EQT Infrastructure"), subject to shareholder approval, regulatory approval and other customary closing conditions. 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.
Sale of Stock, Price Per Share	$ 18
Subsequent Event [Member] | DC74 LLC [Member]
Business Acquisition, Date of Acquisition Agreement		Jan. 31, 2017
Payments to Acquire Businesses, Gross		$ 23.5
Subsequent Event [Member] | Clarity Communications, LLC [Member]
Business Acquisition, Date of Acquisition Agreement			Jan. 4, 2017
Total Purchase Price			$ 15
Payments to Acquire Businesses, Gross			10
Earnout Provision Amount in Purchase Price			$ 5
Minimum [Member] | Subsequent Event [Member]
Total Purchase Price		28
Minimum [Member] | Subsequent Event [Member] | DC74 LLC [Member]
Earnout Provision Amount in Purchase Price		5
Maximum [Member] | Subsequent Event [Member] | DC74 LLC [Member]
Total Purchase Price		29
Earnout Provision Amount in Purchase Price		$ 6