Other Comprehensive Earnings - Reclassifications Out of Accumulated Other Comprehensive Earnings/(Loss) (Parenthetical) (Detail) (Reclassification out of Accumulated Other Comprehensive Earnings [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014
Cost of goods sold [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Abstract]
Actuarial loss reclassified to net pension expense on consolidated statements of earning	$ 512
Selling, general and administrative expenses [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Abstract]
Actuarial loss reclassified to net pension expense on consolidated statements of earning	701
Research and development expenses [Member]
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Abstract]
Actuarial loss reclassified to net pension expense on consolidated statements of earning	$ 220