Employee Retirement and Profit Sharing Plans - Reconciliation of Projected Benefit Obligation and Fair Value of Plans Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 290,746
Fair value of plan assets at end of year	278,915	$ 290,746
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	345,766	293,850
Service cost	3,631	3,081	$ 3,692
Interest cost	13,736	13,979
Plan participants’ contributions	10	13
Plan amendments	72	(411)
Actuarial (gain) loss	(10,351)	57,716
Benefits paid	(18,889)	(22,462)
Benefit obligation at end of year	333,975	345,766	293,850
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	289,526	270,123
Actual return on plan assets	(6,716)	28,980
Employer contributions	18,822	14,338
Plan participants’ contributions	10	13
Benefits paid	(18,889)	(22,462)
Plan settlements	0	(1,466)
Fair value of plan assets at end of year	282,753	289,526	$ 270,123
Funded status at end of year	$ (51,222)	$ (56,240)