Other Comprehensive Earnings - Reclassifications out of Accumulated Other Comprehensive Earnings/(Loss) (Parenthetical) (Detail) (Reclassification out of Accumulated Other Comprehensive Earnings [Member], Accumulated Defined Benefit Plans Adjustment [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013
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	$ 2,251
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	1,226
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	$ 3,017