Concentrations of Credit Risk (Details)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Concentration Risk [Line Items]
Percentage of consolidated revenues	89.00%	87.00%
Sprint [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues	26.00%	28.00%
T-Mobile [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues	21.00%	23.00%
AT T [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues	27.00%	21.00%
Verizon Wireless [Member]
Concentration Risk [Line Items]
Percentage of consolidated revenues	15.00%	15.00%

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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-Section 50

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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