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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 52

-Subparagraph c

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

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

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 45

-Subparagraph a(1)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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Aggregate amount of intangible asset amortization recognized as expense during the period.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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A description of the remaining amortization period of a major finite-lived intangible asset class.

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-Publisher FASB

-Name Accounting Standards Codification

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4. Intangible Assets, Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Mar. 31, 2012 Customer Relationships [Member]	Dec. 31, 2011 Customer Relationships [Member]	Mar. 31, 2012 Know how [Member]	Dec. 31, 2011 Know how [Member]	Mar. 31, 2012 Developed Technology Rights [Member]	Dec. 31, 2011 Developed Technology Rights [Member]	Mar. 31, 2012 Licensing Agreements [Member]	Dec. 31, 2011 Licensing Agreements [Member]	Mar. 31, 2012 Trade Names [Member]	Dec. 31, 2011 Trade Names [Member]	Mar. 31, 2012 Noncompete Agreements [Member]	Dec. 31, 2011 Noncompete Agreements [Member]	Mar. 31, 2012 Patents [Member]	Dec. 31, 2011 Patents [Member]	Mar. 31, 2012 Other Intangible Assets [Member]	Dec. 31, 2011 Other Intangible Assets [Member]	Jan. 18, 2012 Portland [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Acquisition, Purchase Price Allocation, Goodwill Amount																				$ 1,100,000
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)				1-12	1-12	1-14	1-14	1-10	1-11	1-8	1-9	1-10	1-10	1-7	1-7	0	0	0	0
Purchase Price	418,900,000		405,300,000	101,700,000	98,700,000	190,600,000	187,000,000	53,700,000	47,600,000	35,600,000	35,600,000	30,300,000	29,500,000	5,900,000	5,800,000	1,000,000	1,000,000	100,000	100,000
Accumulated Amortization	(160,600,000)		(145,800,000)	(33,800,000)	(30,900,000)	(52,500,000)	(45,700,000)	(26,500,000)	(24,600,000)	(16,500,000)	(15,700,000)	(24,400,000)	(22,100,000)	(5,800,000)	(5,700,000)	(1,000,000)	(1,000,000)	(100,000)	(100,000)
Net Carrying Amount	258,312,000		259,497,000	67,900,000	67,800,000	138,100,000	141,300,000	27,200,000	23,000,000	19,100,000	19,900,000	5,900,000	7,400,000	100,000	100,000	0	0	0	0
Finite-Lived Intangible Assets [Abstract]
Amortization expense	10,800,000	8,800,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets																				$ 5,100,000