Acquisitions, Investments and Licenses - Acquisition Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		2 Months Ended	3 Months Ended		6 Months Ended
	Aug. 31, 2015	May 31, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Purchase price allocation adjustment, decrease in goodwill						$ 54,300
Income tax (provision) benefit				$ (15,868)	$ (251)	4,638	$ (5,760)
Reduction of goodwill				$ (691,060)		$ (691,060)		$ (743,348)
Common Stock
Business Acquisition [Line Items]
Stock price per share (in dollars per share)	$ 12.38	$ 13.88		$ 9.34		$ 9.34
Bio-Reference
Business Acquisition [Line Items]
Consideration transferred	$ 950,100
Value of replacement stock option awards	2,259
Purchase price allocation adjustment, other current assets						$ 38,000
Purchase price allocation adjustment, decrease in goodwill						54,300
Purchase price allocation adjustment, decrease in accrued expenses						500
Purchase price allocation adjustment, income taxes payable						600
Purchase price allocation adjustment, decrease in deferred tax liability						8,600
Purchase price allocation adjustment, increase in amortization						2,200
Reduction of goodwill	$ (386,858)			$ (386,900)		(386,900)
Useful life	13 years 260 days
Cash paid at closing date	$ 950,148
Bio-Reference | Common Stock
Business Acquisition [Line Items]
Common stock received	76,566,147
Acquired entity share price (in dollars per share)	$ 34.05
EirGen
Business Acquisition [Line Items]
Consideration transferred		$ 133,800
Value of replacement stock option awards		33,600
Reduction of goodwill		$ (83,373)
Useful life		15 years
Cash paid at closing date		$ 100,200
Revenue			$ 2,300
Net income (loss)			$ 800
EirGen | Common Stock
Business Acquisition [Line Items]
Common stock received		2,420,487
Other intangible assets | Bio-Reference
Business Acquisition [Line Items]
Purchase price allocation adjustment, other intangible assets						7,800
Trade Names | Bio-Reference
Business Acquisition [Line Items]
Useful life	5 years
Customer Relationships | Bio-Reference
Business Acquisition [Line Items]
Useful life	19 years 100 days
Customer Relationships | EirGen
Business Acquisition [Line Items]
Useful life		15 years 290 days
Technology | Bio-Reference
Business Acquisition [Line Items]
Useful life	10 years 60 days
Currently Marketed Products | EirGen
Business Acquisition [Line Items]
Useful life		10 years
Change in Income Tax Accounting Method
Business Acquisition [Line Items]
Income tax (provision) benefit				51,200
Other Current Assets and Prepaid Expenses | Change in Income Tax Accounting Method
Business Acquisition [Line Items]
Income tax (provision) benefit				39,400
Reduction of goodwill				51,200		$ 51,200
Deferred Tax Liabilities | Change in Income Tax Accounting Method
Business Acquisition [Line Items]
Income tax (provision) benefit				$ 11,800