Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments (Details)

v3.6.0.2
Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Jan. 02, 2016
Assets    
Asset measured at, fair value $ 5,470  
Recurring [Member]    
Assets    
Assets measured at fair value, Adjusted cost 7,446 $ 46,207
Assets measured at fair value, Unrealized gains 40 37
Assets measured at fair value, Unrealized losses (661) (2,070)
Asset measured at, fair value 6,825 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 31 29
Assets measured at fair value, Unrealized losses (159) (274)
Asset measured at, fair value 1,355 3,684
Liabilities    
Liabilities Measured at Fair Value Adjusted Cost 10 17
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value 10 17
Recurring [Member] | Level 1 [Member] | Phantom Share Units (PSUs) [Member]    
Liabilities    
Liabilities Measured at Fair Value Adjusted Cost 10 17
Liabilities measured at fair value, Unrealized gains 0 0
Liabilities measured at fair value, Unrealized losses 0 0
Liabilities measured at fair value 10 17
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 31 28
Assets measured at fair value, Unrealized losses 0 (36)
Asset measured at, fair value 31 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 (159) (238)
Asset measured at, fair value 1,324 2,374
Recurring [Member] | Level 2 [Member]    
Assets    
Assets measured at fair value, Adjusted cost 5,963 42,278
Assets measured at fair value, Unrealized gains 9 8
Assets measured at fair value, Unrealized losses (502) (1,796)
Asset measured at, fair value 5,470 40,490
Recurring [Member] | Level 2 [Member] | Corporate fixed income [Member]    
Assets    
Assets measured at fair value, Adjusted cost 4,288 35,936
Assets measured at fair value, Unrealized gains 9 8
Assets measured at fair value, Unrealized losses (408) (1,682)
Asset measured at, fair value 3,889 34,262
Recurring [Member] | Level 2 [Member] | Certificates of deposit [Member]    
Assets    
Assets measured at fair value, Adjusted cost   2,947
Assets measured at fair value, Unrealized gains   0
Assets measured at fair value, Unrealized losses   0
Asset measured at, fair value   2,947
Recurring [Member] | Level 2 [Member] | Municipal bonds [Member]    
Assets    
Assets measured at fair value, Adjusted cost 1,675 2,897
Assets measured at fair value, Unrealized gains 0 0
Assets measured at fair value, Unrealized losses (94) (94)
Asset measured at, fair value $ 1,581 2,803
Recurring [Member] | Level 2 [Member] | Asset backed securities [Member]    
Assets    
Assets measured at fair value, Adjusted cost   498
Assets measured at fair value, Unrealized gains   0
Assets measured at fair value, Unrealized losses   (20)
Asset measured at, fair value   $ 478