Employee Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 29, 2012 Location	Mar. 31, 2012 Location
Multiemployer Plans [Line Items]
Location to discontinue our participation in Central States MEPP	2	2
Redundant branch facilities closed		2
Remaining location participating in Central States MEPP	1
Period of payment of withdrawal liability		20 years
Pension withdrawal and associated expenses		$ 24.0
Maximum [Member]
Multiemployer Plans [Line Items]
Estimated share of undiscounted, unfunded vested benefits under all the MEPPs	4.0
Multiemployer Plans, Pension [Member] | Minimum [Member]
Multiemployer Plans [Line Items]
Estimated share of undiscounted, unfunded vested benefits under all the MEPPs	3.0
Pension Plan [Member]
Multiemployer Plans [Line Items]
Employer Contribution for pension plan	3.5