PRINCIPAL CLIENTS (Tables)

12 Months Ended

Dec. 31, 2013

Risks and Uncertainties [Abstract]

Schedule of Revenue by Major Client

The following table represents revenue concentration of our principal clients:

	Year Ended December 31,
	2013			2012
	Revenue		Percentage	Revenue		Percentage
AT&T Services, Inc. and AT&T Mobility, LLC, subsidiaries of AT&T, Inc. (1)	$	58,395	25.3%	$	63,904	32.3%
T-Mobile USA, Inc., a subsidiary of Deutsche Telekom (2)	$	64,095	27.7%	$	55,916	28.2%
Comcast Cable Communications Management, LLC, subsidiary of Comcast Corporation (2)	$	45,887	19.8%	*		*

* less than 10%

(1) Revenue from this customer is generated through our Domestic and Asia Pacific segments.

(2) Revenue from this customer is generated through our Domestic, Asia Pacific and Latin America segments.