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Concentrations Of Risk (Tables)

12 Months Ended

Dec. 31, 2011


	2011			2010			2009
Revenue from top ten customers		71	%		72	%		72	%
Revenue from specific customers:
DIRECTV^®		23	%		24	%		30	%
AT&T		23	%		20	%		16	%

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.