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Accumulated Other Comprehensive Income or Loss - Schedule Of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Dec. 28, 2013
Jan. 02, 2016
Jan. 03, 2015
Statement Of Income And Comprehensive Income [Abstract]      
Balance at beginning of the fiscal year, net of tax $ (13,687) $ (11,655) $ (8,794)
Other comprehensive (loss) income before reclassifications 6,604 (455) (8,195)
Income tax benefit (expense) (2,525) 114 3,138
Other comprehensive income, net of tax, before reclassifications 4,079 (341) (5,057)
Amortization of amounts included in net periodic benefit cost 1,712 884 3,410
Income tax expense (898) (335) (1,214)
Amounts reclassified out of AOCI, net of tax 814 549 2,196
Other comprehensive income (loss), net of tax 4,893 208 (2,861)
Balance at end of the fiscal year, net of tax $ (8,794) $ (11,447) $ (11,655)