Guarantees - Details of Letters of Credit Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 05, 2015
Guarantor Obligations [Line Items]
Guarantee Amount	$ 2,403
Bank Guarantees
Guarantor Obligations [Line Items]
Guarantee Amount	1,241
Guarantee due date	Various from May 2015 to January 2017
Warranty Bonds
Guarantor Obligations [Line Items]
Guarantee Amount	594
Guarantee due date	Various from May 2015 to December 2016
Performance Bonds
Guarantor Obligations [Line Items]
Guarantee Amount	$ 568
Guarantee due date	Various from June 2015 to December 2017