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PRINCIPAL CLIENTS (Major Customer) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T Inc. [Member]
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| Revenue, Major Customer [Line Items] | ||||||||
| Revenue | $ 58,395 | [1] | $ 63,904 | [1] | ||||
| Revenue concentration, percentage | 25.30% | [1] | 32.30% | [1] | ||||
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T-Mobile USA, Inc., a subsidiary of Deutsche Telekom [Member]
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| Revenue, Major Customer [Line Items] | ||||||||
| Revenue | 64,095 | [2] | 55,916 | [2] | ||||
| Revenue concentration, percentage | 27.70% | [2] | 28.20% | [2] | ||||
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Comcast Cable Communications Management LLC, subsidiary of Comcast Corporation [Member]
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| Revenue, Major Customer [Line Items] | ||||||||
| Revenue | $ 45,887 | [2] | ||||||
| Revenue concentration, percentage | 19.80% | [2] | ||||||
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