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Employee Benefits - Unfunded Status and Amounts Recognized on Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Jan. 02, 2016
Compensation and Retirement Disclosure [Abstract]    
Unfunded status $ (34,349) $ (36,791)
Unrecognized prior service cost 0 1
Unrecognized actuarial loss 34,014 31,871
Amounts recognized on the balance sheet consist of:    
Accrued pension liability (34,349) (36,791)
Accumulated other comprehensive loss (pre-tax) 34,014 31,872
Net amount recognized $ (335) $ (4,919)