Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Loss Contingency, Management's Assessment and Process	The Company previously reported charges incurred in 2014 for the write-down of inventory and provisions to accounts receivable associated with the October 6, 2014 bankruptcy filing of GT Advanced Technologies (GTAT). The Company noted then that its actual loss could differ from the amounts originally recorded. In October 2016, the Company learned that the trustee in the GTAT bankruptcy proceedings filed adversary actions against three of the Company’s subsidiaries (for which service of process was only recently completed) to recover payments aggregating approximately $4.4 million, which were received by the subsidiaries during the 90 days preceding GTAT’s bankruptcy filing, on the premise that such payments were made during the preference period and therefore may be avoidable as preferential or constructively fraudulent, among other theories. These adversary actions are subject to mandatory mediation procedures by order of the bankruptcy court. The Company believes that the payments were made in the ordinary course of business, and, although the outcome cannot be predicted at this time, the Company intends to vigorously defend against the claims.
GTAT bankruptcy trustee [Member]
Loss Contingencies [Line Items]
Loss Contingency, Lawsuit Filing Date	October 2016
GTAT bankruptcy trustee [Member] | Threatened Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 4.4