Accumulated Other Comprehensive Loss - Summary of Impact of Accumulated Other Comprehensive Income (Loss) on Income Statement (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	$ 644	$ 1,164	$ 1,876	$ 3,492
Reclassification to income, Tax Effect	249	449	726	1,362
Reclassification to income, Net of Tax	395	715	1,150	2,130
Cost of Sales [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	107	118	310	343
Selling, Delivery and Administrative (S,D&A) Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	537	1,046	1,566	3,149
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	459	841	1,321	2,525
Reclassification to income, Tax Effect	177	325	510	985
Reclassification to income, Net of Tax	282	516	811	1,540
Pension Plans [Member] | Cost of Sales [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	83	76	238	227
Pension Plans [Member] | Selling, Delivery and Administrative (S,D&A) Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	376	765	1,083	2,298
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	185	323	555	967
Reclassification to income, Tax Effect	72	124	216	377
Reclassification to income, Net of Tax	113	199	339	590
Postretirement Benefits [Member] | Cost of Sales [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	24	42	72	116
Postretirement Benefits [Member] | Selling, Delivery and Administrative (S,D&A) Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Reclassification to income, Pre-tax Activity	$ 161	$ 281	$ 483	$ 851