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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Accounting Policies [Abstract] |
Activity in the allowance for doubtful accounts | The activity in the allowance for doubtful accounts during the years ended December 31, 2015, 2014 and 2013 was as follows:
|  |  |  |  |  |  |  |  |  |  | Write Off of |  |  |  |
|  | Balance |  | Charged to |  | Allowance |  | Uncollectible |  | Balance at |
|  | at Beginning |  | Costs and |  | From |  | Accounts, Net of |  | End of |
Year Ended |  | of Period |  | Expenses |  | Acquisitions |  | Recoveries |  | Period |
|  | (in thousands) |
December 31, 2015 |  | $ | 395 |  | $ | 339 |  | $ | 99 |  | $ | (169) |  | $ | 664 |
December 31, 2014 |  | $ | 578 |  | $ | 139 |  | $ | — |  | $ | (322) |  | $ | 395 |
December 31, 2013 |  | $ | 577 |  | $ | 293 |  | $ | — |  | $ | (292) |  | $ | 578 |
Property and equipment | Property and equipment consisted of the following:
|  | Estimated |  | December 31, |
|  | Useful Life |  | 2015 |  | 2014 |
|  |  |  | (In thousands) |
Land and land improvements |  | — |  | $ | 13,207 |  | $ | 11,026 |
Buildings |  | 31.5 years |  |  | 34,543 |  |  | 33,275 |
Towers and antennae |  | 7-15 years |  |  | 27,616 |  |  | 26,191 |
Equipment |  | 3-15 years |  |  | 79,624 |  |  | 79,216 |
Furniture, fixtures and leasehold improvements |  | 7-20 years |  |  | 8,263 |  |  | 8,104 |
Vehicles |  | 5 years |  |  | 3,821 |  |  | 3,790 |
|  |  |  |  | 167,074 |  |  | 161,602 |
Accumulated depreciation |  |  |  |  | (108,943) |  |  | (106,415) |
Net property and equipment |  |  |  | $ | 58,131 |  | $ | 55,187 |
Computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings per share:
|  | Years Ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (In thousands, except per share data) |
Numerator: |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 13,414 |  | $ | 14,904 |  | $ | 15,273 |
Less: Net income allocated to unvested participating securities |  |  | 250 |  |  | 234 |  |  | 135 |
Net income available to common stockholders |  | $ | 13,164 |  | $ | 14,670 |  | $ | 15,138 |
Denominator: |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per share-weighted average shares |  |  | 5,706 |  |  | 5,700 |  |  | 5,681 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |
Stock options |  |  | 34 |  |  | 53 |  |  | 64 |
Denominator for diluted earnings per share — adjusted weighted-average shares and assumed conversions |  |  | 5,740 |  |  | 5,753 |  |  | 5,745 |
Basic earnings per share |  | $ | 2.31 |  | $ | 2.57 |  | $ | 2.66 |
Diluted earnings per share |  | $ | 2.29 |  | $ | 2.55 |  | $ | 2.64 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 + Details
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