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2. Acquisitions (Details) (USD $)			0 Months Ended	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Jan. 10, 2013 AbD Serotec [Member]	Mar. 31, 2013 AbD Serotec [Member]
Business Acquisition [Line Items]
Cash Acquired from Acquisition				$ 7,300,000
Business Combination, Consideration Transferred			62,200,000
Goodwill	520,525,000	517,770,000	14,900,000
Finite-lived Intangible Assets Acquired			44,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			$ 3,300,000

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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