Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Total revenues | $ 235,529 | $ 231,214 | $ 224,346 | $ 228,115 | $ 232,293 | $ 236,655 | $ 233,766 | $ 231,098 | $ 919,204 | $ 933,812 | $ 978,534 |
| Operating income | 20,699 | 24,174 | 11,031 | 15,346 | 13,185 | 26,368 | 19,531 | 20,019 | 71,250 | 79,103 | 106,211 |
| Net income (loss) | 48,373 | (8,849) | (9,000) | (55,246) | (16,243) | 7,827 | 3,298 | 982 | (24,722) | (4,136) | (25,866) |
| Net income (loss) attributable to GCI | $ 48,496 | $ (8,731) | $ (8,882) | $ (55,129) | $ (16,124) | $ 7,943 | $ 3,415 | $ 1,099 | $ (24,246) | $ (3,667) | $ (26,025) |
| Basic net income (loss) attributable to GCI per common share (USD per share) | $ 1.35 | $ (0.25) | $ (0.26) | $ (1.60) | $ (0.47) | $ 0.21 | $ 0.09 | $ 0.03 | |||
| Diluted net income (loss) attributable to GCI per common share (USD per share) | $ 1.19 | $ (0.25) | $ (0.26) | $ (1.60) | $ (0.47) | $ 0.14 | $ (0.01) | $ (0.04) | |||
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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