Employee Retirement and Profit Sharing Plans - Fair Values by Category of Inputs (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	$ 270,123		$ 251,094
Equity Securities, Common Stock
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	177		112
Equity Securities Index Funds U S Equities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	133,763	[1]	119,377	[1]
Equity Securities Index Funds International Equities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	27,571	[2]	22,373	[2]
Equity Securities Index Funds Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	8,712	[3]	7,320	[3]
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	170,223		149,182
Fixed Income, Bond Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	92,103	[4]	93,200	[4]
Fixed Income Diversified Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,093	[5]	2,938	[5]
Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	95,196		96,138
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,840	[6]	4,327	[6]
Total Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,840		4,327
Other Investments Partnerships Joint Ventures
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	864	[7]	1,447	[7]
Other Investments
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	864		1,447
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	177		112
Level 1 | Equity Securities, Common Stock
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	177		112
Level 1 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	177		112
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	265,989		246,597
Level 2 | Equity Securities Index Funds U S Equities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	133,763	[1]	119,377	[1]
Level 2 | Equity Securities Index Funds International Equities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	27,571	[2]	22,373	[2]
Level 2 | Equity Securities Index Funds Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	8,712	[3]	7,320	[3]
Level 2 | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	170,046		149,070
Level 2 | Fixed Income, Bond Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	92,103	[4]	93,200	[4]
Level 2 | Fixed Income Diversified Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	0	[5]
Level 2 | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	92,103		93,200
Level 2 | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,840	[6]	4,327	[6]
Level 2 | Total Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,840		4,327
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,957		4,385		4,846
Level 3 | Fixed Income Diversified Funds
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,093	[5]	2,938	[5]	3,266
Level 3 | Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	3,093		2,938
Level 3 | Other Investments Partnerships Joint Ventures
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	864	[7]	1,447	[7]	1,580
Level 3 | Other Investments
Defined Benefit Plan Disclosure [Line Items]
Total, Fair Value	$ 864		$ 1,447

[1] Represents a pooled/separate account that tracks the Dow Jones U.S. Total Stock Market Index.

[2] Represents a pooled/separate account that tracks the MSCI EAFE Index.

[3] Represents a pooled/separate account comprised of approximately 90% U.S. large-cap stocks and 10% in international stocks.

[4] Represents a pooled/separate account which tracks the overall performance of the Barclays Capital Long Term Government/Credit Index.

[5] Represents a pooled/separate account investment in the General Investment Account of an investment manager. The account primarily invests in fixed income debt securities, such as high grade corporate bonds, government bonds and asset-backed securities.

[6] Investment is comprised of high grade money market instruments with short-term maturities and high liquidity.

[7] The majority of the total partnership balance is a partnership comprised of a portfolio of two limited partnership funds that invest in public and private equity.