Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Taxes
Income tax (benefit) expense	$ (838)	$ (7,112)	$ (4,107)	$ (6,852)
Effective tax rate (as a percent)			10.10%
Release of deferred tax asset valuation allowance				6,590
Income tax benefit, Tax windfall			$ (4,451)	(2,830)
Tax expense based on estimated annual effective tax rate expected			$ 345	$ 1,463
SinfoniaRx
Income Taxes
Net deferred tax liability recognized		$ 8,897