Retirement Plans - Schedule of Level Three Defined Benefit Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	$ 799,166	$ 742,341
Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	489,310	419,251
Total Investments Measured at Net Asset Value as a Practical Expedient [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	309,856	323,090
Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	10,073	4,576
Equities [Member] | Domestic [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	30,759
Equities [Member] | International [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	829
Mutual Funds [Member] | Domestic Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	37,711	33,033
Mutual Funds [Member] | International Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	28,975	26,760
Debt Securities [Member] | Domestic Corporate Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	196,743	181,973
Debt Securities [Member] | Foreign Corporate Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	20,120	18,000
Debt Securities [Member] | U.S. Government Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	154,007	143,904
Debt Securities [Member] | US Government Agencies Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	7,548	7,789
Debt Securities [Member] | Other Debt Obligations [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	2,545	3,216
Common Collective Trust Funds [Member] | Domestic Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	244,152	264,534
Common Collective Trust Funds [Member] | International Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	59,257	53,284
Common Collective Trust Funds [Member] | Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	6,447	5,272
Level 1 [Member] | Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	108,347	64,369
Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	10,073	4,576
Level 1 [Member] | Equities [Member] | Domestic [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	30,759
Level 1 [Member] | Equities [Member] | International [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	829
Level 1 [Member] | Mutual Funds [Member] | Domestic Equities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	37,711	33,033
Level 1 [Member] | Mutual Funds [Member] | International Equity Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	28,975	26,760
Level 2 [Member] | Investments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	380,963	354,882
Level 2 [Member] | Debt Securities [Member] | Domestic Corporate Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	196,743	181,973
Level 2 [Member] | Debt Securities [Member] | Foreign Corporate Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	20,120	18,000
Level 2 [Member] | Debt Securities [Member] | U.S. Government Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	154,007	143,904
Level 2 [Member] | Debt Securities [Member] | US Government Agencies Debt Securities [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	7,548	7,789
Level 2 [Member] | Debt Securities [Member] | Other Debt Obligations [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Fair value of plan assets	$ 2,545	$ 3,216