Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following tables summarize the changes in Level 3 assets and the gains and losses included in earnings for the year ended December 31, 2016:

Fair Value Measurements Using Significant Unobservable Inputs (Level 3) - Royalty Right Assets
(in thousands)				Royalty Rights - At Fair Value
Fair value as of December 31, 2015							$	399,204
	Fair value of financial instruments purchased						59,500
	Total net change in fair value for the period
		Change in fair value of royalty rights - at fair value		$	16,196
		Proceeds from royalty rights - at fair value		$	(72,582	)
			Total net change in fair value for the period				(56,386		)
Fair value as of December 31, 2016							$	402,318

Schedule of fair value of financial instruments measured on recurring basis

	December 31, 2016								December 31, 2015
(In thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Financial assets:
Money market funds	$	4	$	—	$	—	$	4	$	94,801	$	—	$	—	$	94,801
Certificates of deposit	—		75,000		—		75,000		—		—		—		—
Corporate securities	—		—		—		—		—		1,469		—		1,469
Commercial paper	—		19,987		—		19,987		—		—		—		—
Foreign currency hedge contracts	—		—		—		—		—		2,802		—		2,802
Warrants	—		78		—		78		—		984		—		984
Royalty rights - at fair value	—		—		402,318		402,318		—		—		399,204		399,204
Total	$	4	$	95,065	$	402,318	$	497,387	$	94,801	$	5,255	$	399,204	$	499,260
Financial liabilities:
Anniversary payment	$	—	$	—	$	88,001	$	88,001	$	—	$	—	$	—	$	—
Contingent consideration	—		—		42,650		42,650		—		—		—		—
Total	$	—	$	—	$	130,651	$	130,651	$	—	$	—	$	—	$	—

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

	December 31, 2016						December 31, 2015
	Carrying Value		Level 2		Level 3		Carrying Value		Level 2		Level 3
(In thousands)
Assets:
Wellstat Diagnostics note receivable	$	50,191	$	—	$	52,260	$	50,191	$	—	$	55,970
Hyperion note receivable	1,200		—		1,200		1,200		—		1,200
LENSAR note receivable	43,909		—		43,900		42,271		—		42,618
Direct Flow Medical note receivable	10,000		—		10,000		51,852		—		51,992
Paradigm Spine note receivable	—		—		—		53,973		—		54,250
kaléo note receivable	146,685		—		142,539		146,778		—		146,789
CareView note receivable	18,965		—		19,200		18,640		—		19,495
Total	$	270,950	$	—	$	269,099	$	364,905	$	—	$	372,314
Liabilities:
February 2018 Notes	$	121,595	$	123,918	$	—	$	228,862	$	197,946	$	—
December 2021 Notes	110,848		122,063		—		—		—		—
Term loan	—		—		—		24,966		—		25,000
Total	$	232,443	$	245,981	$	—	$	253,828	$	197,946	$	25,000