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, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of the federal statutory income tax rate to the company's effective income tax rate for continuing operations
Federal income tax at statutory rate (as a percent)	35.00%	35.00%	35.00%
State income provision (benefit) (as a percent)	2.30%	5.70%	16.50%
Manufacturing & research incentives (as a percent)	2.00%	(0.40%)	6.10%
Taxes on foreign income which differ from the U.S. statutory rate (as a percent)	3.00%	3.20%	44.10%
Adjustments for unrecognized tax benefits (as a percent)	(4.00%)	1.50%	51.50%
Adjustments for valuation allowances (as a percent)	(69.80%)	(8.50%)	(25.00%)
Spin-off tax costs (as a percent)	(0.013)	(0.018)	0.000
Change in assertion over permanently reinvest foreign earnings (as a percent)	(0.00%)	(0.00%)	(26.40%)
Other items (as a percent)	(4.70%)	2.30%	(14.50%)
Effective tax rate (as a percent)	(37.50%)	37.00%	87.30%