SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of period	$ 27,134	$ 32,847	$ 41,703
Charged to Costs and Expenses	(802)	(1,880)	(5,979)
Charged to Other Accounts	(52)	(294)	179
Deductions	(2,735)	(3,539)	(3,056)
Balance at End of Period	23,545	27,134	32,847
Inventory reserve
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of period	6,801	6,645	6,984
Charged to Costs and Expenses	43,076	3,270	(3,141)
Charged to Other Accounts		(366)	9
Deductions	(4,736)	(2,748)	2,793
Balance at End of Period	45,141	6,801	6,645
Valuation allowance on deferred tax assets
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of period	1,547,441	1,520,852	1,485,540
Charged to Other Accounts	(9,934)	26,589	35,312
Balance at End of Period	$ 1,537,507	$ 1,547,441	$ 1,520,852

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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 FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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