Guarantees - Details of Letters of Credit Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014
Guarantor Obligations [Line Items]
Guarantee Amount	$ 2,188
Bank Guarantees
Guarantor Obligations [Line Items]
Guarantee Amount	989
Guarantee due date	Various from October 2014 to August 2016
Warranty Bonds
Guarantor Obligations [Line Items]
Guarantee Amount	807
Guarantee due date	Various from October 2014 to August 2016
Performance Bonds
Guarantor Obligations [Line Items]
Guarantee Amount	$ 392
Guarantee due date	Various from December 2014 to December 2017