XML 33 R21.htm IDEA: XBRL DOCUMENT v3.5.0.2
Employee Benefits (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 02, 2016
Jul. 04, 2015
Jul. 02, 2016
Jul. 04, 2015
Compensation and Retirement Disclosure [Abstract]        
Service cost $ 252 $ 300 $ 504 $ 600
Interest cost on projected benefit obligation 1,271 1,250 2,542 2,500
Expected return on plan assets (1,551) (1,523) (3,102) (3,046)
Amortization of unrecognized loss 223 211 447 422
Net periodic pension cost $ 195 $ 238 $ 391 $ 476