Income Taxes - Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Taxes
Income tax (benefit) expense	$ (8,105)	$ (164)	$ (7,845)	$ 11
Release of deferred tax asset valuation allowance			6,590
Income tax benefit, Tax windfall			2,830
Tax expense based on estimated annual effective tax rate expected			$ 1,463
Effective tax rate (as a percent)				(5.30%)
SinfoniaRx
Income Taxes
Net deferred tax liability recognized	$ 8,897