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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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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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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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

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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
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Customer Relationships [Member]	Dec. 31, 2012 Customer Relationships [Member]	Mar. 31, 2013 Know how [Member]	Dec. 31, 2012 Know how [Member]	Mar. 31, 2013 Developed Technology Rights [Member]	Dec. 31, 2012 Developed Technology Rights [Member]	Mar. 31, 2013 Licensing Agreements [Member]	Dec. 31, 2012 Licensing Agreements [Member]	Mar. 31, 2013 Trade Names [Member]	Dec. 31, 2012 Trade Names [Member]	Mar. 31, 2013 Noncompete Agreements [Member]	Dec. 31, 2012 Noncompete Agreements [Member]	Mar. 31, 2013 Other Intangible Assets [Member]	Dec. 31, 2012 Other Intangible Assets [Member]	Jan. 10, 2013 AbD Serotec [Member]	Jan. 10, 2013 AbD Serotec [Member] Customer Relationships [Member]	Jan. 10, 2013 AbD Serotec [Member] Developed Technology Rights [Member]	Jan. 10, 2013 AbD Serotec [Member] Licensing Agreements [Member]	Jan. 10, 2013 AbD Serotec [Member] Trade Names [Member]	Jan. 10, 2013 AbD Serotec [Member] Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Acquisition, Purchase Price Allocation, Goodwill Amount																		$ 17,000,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets																		42,300,000	1,100,000	31,900,000	8,400,000	400,000	500,000
Finite-Lived Intangible Assets, Net [Abstract]
Average Remaining Life (years)				1-12	1-12	1-13	1-13	1-14	1-10	1-13	1-8	1-10	1-10	1-10	1-10	1	1
Purchase Price	447,100,000		414,700,000	100,900,000	102,800,000	185,800,000	189,300,000	103,800,000	74,600,000	43,700,000	35,600,000	7,400,000	7,400,000	4,900,000	4,900,000	600,000	100,000
Accumulated Amortization	(160,400,000)		(153,800,000)	(39,100,000)	(38,400,000)	(70,100,000)	(67,100,000)	(26,900,000)	(25,100,000)	(19,500,000)	(18,700,000)	(4,200,000)	(4,300,000)	(400,000)	(200,000)	(200,000)	0
Net Carrying Amount	286,722,000		260,939,000	61,800,000	64,400,000	115,700,000	122,200,000	76,900,000	49,500,000	24,200,000	16,900,000	3,200,000	3,100,000	4,500,000	4,700,000	400,000	100,000
Amortization [Abstract]
Amortization expense	$ 11,100,000	$ 10,800,000