Represents the adjustments for accelerated depreciation on certain corporate assets recognized during the period.

No definition available.

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- Definition

Represents the number of reportable units of an entity for which there is an accounting requirement to report financial information on that unit in the entity's financial statements.

+ References

No definition available.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 1

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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-Publisher FASB

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2014 item	Dec. 31, 2013	Dec. 31, 2012
Goodwill
Number of reportable units	4atr_NumberOfReportableUnits
Impairment of goodwill	$ 0us-gaap_GoodwillImpairmentLoss
IMPAIRMENT OF LONG-LIVED ASSETS
Adjustment for accelerated depreciation		1,500,000
RESEARCH & DEVELOPMENT EXPENSES
Research and development expenses incurred net of customer funded research and development or government research and development credits	76,200,000us-gaap_ResearchAndDevelopmentExpense	71,800,000us-gaap_ResearchAndDevelopmentExpense	65,400,000us-gaap_ResearchAndDevelopmentExpense
TRANSLATION OF FOREIGN CURRENCIES
Realized and unrealized foreign currency transaction gain (loss)	$ (37,000)	$ (6,300,000)	$ (1,600,000)
Patents, non-compete agreements and license agreements \| Minimum
FINITE-LIVED INTANGIBLE ASSETS
Finite-Lived Intangible Asset, Useful Life	3 years
Patents, non-compete agreements and license agreements \| Maximum
FINITE-LIVED INTANGIBLE ASSETS
Finite-Lived Intangible Asset, Useful Life	20 years