Other Comprehensive Income - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) (Reclassification out of Accumulated Other Comprehensive Earnings [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 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	$ 1,011
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	1,383
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	$ 435