Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

v3.5.0.2
Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Oct. 01, 2016
Jan. 02, 2016
Assets    
Asset measured at, fair value $ 32,560  
Recurring [Member]    
Assets    
Assets measured at fair value, Adjusted cost 34,508 $ 46,207
Assets measured at fair value, Unrealized gains 75 37
Assets measured at fair value, Unrealized losses (725) (2,070)
Asset measured at, fair value 33,858 44,174
Recurring [Member] | Level 1 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,483 3,929
Assets measured at fair value, Unrealized gains 0 29
Assets measured at fair value, Unrealized losses (185) (274)
Asset measured at, fair value 1,298 3,684
Recurring [Member] | Level 1 [Member] | Equity securities [Member]    
Assets    
Assets measured at fair value, Adjusted cost 0 1,318
Assets measured at fair value, Unrealized gains 0 28
Assets measured at fair value, Unrealized losses 0 (36)
Asset measured at, fair value 0 1,310
Recurring [Member] | Level 1 [Member] | Mutual funds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,483 2,611
Assets measured at fair value, Unrealized gains 0 1
Assets measured at fair value, Unrealized losses (185) (238)
Asset measured at, fair value 1,298 2,374
Recurring [Member] | Level 2 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 33,025 42,278
Assets measured at fair value, Unrealized gains 75 8
Assets measured at fair value, Unrealized losses (540) (1,796)
Asset measured at, fair value 32,560 40,490
Liabilities    
Liabilities Measured at Fair Value Adjusted Cost 26 17
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value 26 17
Recurring [Member] | Level 2 [Member] | Phantom Share Units (PSUs) [Member]    
Liabilities    
Liabilities Measured at Fair Value Adjusted Cost 26 17
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value 26 17
Recurring [Member] | Level 2 [Member] | Corporate fixed income [Member]    
Assets    
Assets measured at fair value, Adjusted cost 26,613 35,936
Assets measured at fair value, Unrealized gains 75 8
Assets measured at fair value, Unrealized losses (478) (1,682)
Asset measured at, fair value 26,210 34,262
Recurring [Member] | Level 2 [Member] | Certificates of deposit [Member]    
Assets    
Assets measured at fair value, Adjusted cost 0 2,947
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses 0 0
Asset measured at, fair value 0 2,947
Recurring [Member] | Level 2 [Member] | Municipal bonds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 6,412 2,897
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses (62) (94)
Asset measured at, fair value 6,350 2,803
Recurring [Member] | Level 2 [Member] | Asset backed securities [Member]    
Assets    
Assets measured at fair value, Adjusted cost 0 498
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses 0 (20)
Asset measured at, fair value $ 0 $ 478