SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts
Changes in valuation and qualifying accounts
Balance at beginning of period	$ 30,145	$ 32,176	$ 26,065
Charged (credited) to costs and expenses	(1,148)	2,161	5,499
(Deductions) Adjustments	(576)	(4,192)	612
Balance at end of period	10,796	30,145	32,176
Allowance for doubtful accounts \| IPTV divestiture
Changes in valuation and qualifying accounts
(Deductions) Adjustments	(17,625)
Tax valuation allowance
Changes in valuation and qualifying accounts
Balance at beginning of period	469,224	473,914	481,742
Charged (credited) to costs and expenses	(30,745)	(3,877)	20,897
Charged (credited) to other accounts	(20,194)	(813)	(28,725)
Balance at end of period	$ 418,285	$ 469,224	$ 473,914

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

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- Definition

+ References

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- Definition

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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+ Details

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