Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Tax amortization benefit contingency	$ 11,651	$ 11,820
Additional consideration due seller	1,215	693
Dow settlement liability	0	10,000
Accrued compensation and benefits	10,103	8,932
Accrued rebates payable	6,712	5,027
Insurance premium financing payable	1,074	639
Severance	1,714	113
Deferred revenue	2,927	100
Notes payable	2,118	5,056
Accrued taxes	7,967	7,848
Accrued interest	4,814	6,321
Other	11,905	9,260
Accrued and other current liabilities	$ 62,200	$ 65,809