Employee Benefit Plans - Fair Value of Plan Assets (Details) - Pension benefits - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Investments measured at NAV	$ 9,431	$ 8,667
Total assets at fair value	31,754	28,985	$ 27,776
U.S. Pension | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	22,323	20,318
U.S. Pension | Mutual Funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	22,323	20,318
U.S. Pension | Mutual Funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
U.S. Pension | Mutual Funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Non-U.S. Pension
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	557	426	$ 396
Non-U.S. Pension | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	557	426
Non-U.S. Pension | Mutual Funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	557	426
Non-U.S. Pension | Mutual Funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0	0
Non-U.S. Pension | Mutual Funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 0	$ 0