Summary of Significant Accounting Policies (Details 6) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation expense
Stock-based compensation	$ 29,624	$ 30,354	$ 30,360
Stock-based compensation expense (income), net of tax	21,886	22,085	23,437
Stock-based compensation expense per basic and diluted share (in dollars per share)	$ 0.11
Stock-based compensation expense per basic share (in dollars per share)		$ 0.12	$ 0.14
Stock-based compensation expense per diluted share (in dollars per share)		$ 0.11	$ 0.13
Excess tax benefits (deficiency) from stock-based compensation	(60)	2,389	1,045
Continuing Operations
Stock-based compensation expense
Stock-based compensation	29,624	30,354	30,360
Continuing Operations \| Cost of sales (excluding depreciation and amortization)
Stock-based compensation expense
Stock-based compensation	680	293	1,392
Continuing Operations \| Selling, general and administrative expenses
Stock-based compensation expense
Stock-based compensation	$ 28,944	$ 30,061	$ 28,968

Impact of stock-based compensation expense on basic earnings per share.

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Impact of stock-based compensation expense on basic and diluted earnings per share.

+ References

No definition available.

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Impact of stock-based compensation expense on diluted earnings per share.

+ References

No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

No definition available.

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- Definition

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

-Paragraph 24

-URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907

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