Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Company's Effective Income Tax Rate for Continuing Operations (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Federal income tax at statutory rate (as a percent)	35.00%	35.00%	35.00%
State income provision (benefit) (as a percent)	16.30%	2.30%	5.70%
Manufacturing & research incentives (as a percent)	7.90%	2.00%	(0.40%)
Taxes on foreign income which differ from the U.S. statutory rate (as a percent)	41.50%	2.40%	8.30%
Adjustments for unrecognized tax benefits (as a percent)	0.50%	(4.00%)	1.50%
Adjustments for valuation allowances (as a percent)	287.70%	(69.80%)	(8.50%)
Spin-off tax costs (as a percent)		(1.30%)	(1.80%)
U.S. Tax Reform (as a percent)	(228.30%)
Other items (as a percent)	(35.40%)	(4.10%)	(2.80%)
Effective tax rate (as a percent)	125.20%	(37.50%)	37.00%