Industry Segments Data (Narratives) (Details) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2016
USD ($)
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Sep. 30, 2016
USD ($)
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Jun. 30, 2016
USD ($)
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Mar. 31, 2016
USD ($)
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Dec. 31, 2015
USD ($)
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Sep. 30, 2015
USD ($)
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Jun. 30, 2015
USD ($)
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Mar. 31, 2015
USD ($)
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Dec. 31, 2016
USD ($)
segment
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Dec. 31, 2015
USD ($)
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Dec. 31, 2014
USD ($)
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| Segment Reporting Information [Line Items] | |||||||||||
| Number of reportable segments | segment | 2 | ||||||||||
| Percentage of long-lived assets not in US | 82.00% | ||||||||||
| Number of Major Customers | 0 | ||||||||||
| Revenues | $ 232,293 | $ 236,655 | $ 233,766 | $ 231,098 | $ 241,344 | $ 258,573 | $ 247,528 | $ 231,089 | $ 933,812 | $ 978,534 | $ 910,198 |
| Customer Concentration Risk | Sales Revenue, Net | |||||||||||
| Segment Reporting Information [Line Items] | |||||||||||
| Revenues | $ 130,800 | $ 108,300 | |||||||||
| Concentration Risk, Percentage | 13.00% | 12.00% | |||||||||
| Wireless | |||||||||||
| Segment Reporting Information [Line Items] | |||||||||||
| Equipment subsidy | 0 | $ 7,700 | $ 17,300 | ||||||||
| Revenues | $ 208,109 | $ 267,676 | $ 269,977 | ||||||||
| X | ||||||||||
- Definition Equipment Subsidy No definition available.
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- Definition Number of Major Customers No definition available.
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- Definition Segment Reporting Information, Percentage of Long-Lived Assets Not Located in Country of Origin No definition available.
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. 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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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