Basis of Presentation - Additional information (Details)	3 Months Ended
Apr. 03, 2015
Basis Of Presentation [Line Items]
Equity method investment ownership percentage on Laser Quantum	41.00%
Ownership in joint venture, Excel Laser Technology Private Limited
Basis Of Presentation [Line Items]
Minority interest ownership percentage	50.00%

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

No definition available.

Name:	us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration