Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of fair value of financial instruments measured on recurring basis

	June 30, 2013						December 31, 2012
	Level 1		Level 2		Total		Level 1		Level 2		Total
(In thousands)
Financial assets:
Money market funds	$	240,256	$	—	$	240,256	$	121,095	$	—	$	121,095
Certificates of deposit	—		26,375		26,375		—		26,128		26,128
Corporate debt securities	—		1,002		1,002		—		13,572		13,572
Total	$	240,256	$	27,377	$	267,633	$	121,095	$	39,700	$	160,795
Financial liabilities:
Foreign currency hedge contracts	$	—	$	2,410	$	2,410	$	—	$	7,581	$	7,581

Schedule of fair value of assets and liabilities not subject to fair value recognition by level within the valuation hierarchy

	June 30, 2013						December 31, 2012
	Carrying Value		Fair Value Level 2		Fair Value Level 3		Carrying Value		Fair Value Level 2		Fair Value Level 3
(In thousands)
Assets:
Wellstat Diagnostics note receivable	$	43,585	$	—	$	43,585	$	41,098	$	—	$	41,098
Merus Labs note receivable	22,500		22,500		—		30,000		30,000		—
AxoGen note receivable and embedded derivative	24,380		—		24,380		22,110		—		22,110
Avinger note receivable	20,168		—		20,168		—		—		—
Total	$	110,633	$	22,500	$	88,133	$	93,208	$	30,000	$	63,208
Liabilities:
Series 2012 Notes	$	168,528	$	246,322	$	—	$	165,528	$	227,187	$	—
May 2015 Notes	145,799		192,254		—		143,433		182,031		—
February 2015 Notes	993		1,376		—		991		1,269		—
Total	$	315,320	$	439,952	$	—	$	309,952	$	410,487	$	—