Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Income tax (benefit) expense		$ (170,866)	$ 11,538	$ 7,065
Effective tax rate	46.20%	46.20%	127.40%	17.70%
Provisional tax benefit		$ 17,600
Increase in valuation allowance		4,200
Unrecognized tax benefits	$ 10,870	10,870	$ 13,330	$ 12,695	$ 0
Unrecognized tax benefits that would impact effective tax rate	10,700	10,700	13,000	$ 12,400
Increase (decrease) in unrecognized tax benefits		(2,500)	$ 600
CBR
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	10,900	10,900
Internal Revenue Service (IRS)
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	265,800	265,800
Tax credit carryforward, amount	14,800	14,800
Internal Revenue Service (IRS) | Lumara Health
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	165,500	165,500
Tax credit carryforward, amount	1,500	1,500
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	90,900	90,900
Tax credit carryforward, amount	1,400	1,400
State and Local Jurisdiction | Lumara Health
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	$ 16,600	$ 16,600