Quarterly report pursuant to Section 13 or 15(d)

Supplemental Retirement Plan and Related Post Retirement Benefits - Summary of the Components of Net Periodic Cost (Detail)

v3.4.0.3
Supplemental Retirement Plan and Related Post Retirement Benefits - Summary of the Components of Net Periodic Cost (Detail)
$ in Thousands
3 Months Ended
Apr. 02, 2016
USD ($)
retirement_plan
Apr. 04, 2015
USD ($)
Compensation and Retirement Disclosure [Abstract]    
Number of non-qualified supplemental retirement defined benefit plans | retirement_plan 2  
SERP    
Defined Benefit Plan Disclosure    
Service cost $ 44 $ 48
Interest cost 225 211
Amortization of prior service cost 104 124
Amortization of net actuarial losses 86 112
Net periodic cost 459 495
SERP Medical    
Defined Benefit Plan Disclosure    
Service cost 1 2
Interest cost 11 10
Amortization of prior service cost 6 6
Amortization of net actuarial losses 5 6
Net periodic cost $ 23 $ 24