Operating (Gains), Losses and Other Charges, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2017		Dec. 28, 2016		Dec. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Pension settlement loss	$ 21		$ 24,297
Software implementation costs	5,247		0		$ 0
(Gains) losses on sales of assets and other, net	(1,729)		29		(93)
Restructuring charges and exit costs	485		1,486		1,524
Impairment charges	326		1,098		935
Operating (gains), losses and other charges, net	4,329		26,910		2,366
Restructuring charges and exit costs [Abstract]
Exit costs	385	[1]	591	[1]	697
Severance and other restructuring charges	100		895		827
Total restructuring charges and exit costs	485		1,486		1,524
Components of change in accrued exit cost liabilities [Roll Forward]
Balance, beginning of year	1,896		2,043
Exit costs	385	[1]	591	[1]	697
Payments, net of sublease receipts	(1,189)		(855)
Interest accretion	88		117
Balance, end of year	1,180		1,896		2,043
Less current portion included in other current liabilities	345		330
Long-term portion included in other noncurrent liabilities	835		1,566
Accrued severance and other restructuring charges	100		400
Estimated net cash payments related to exit cost liabilities [Abstract]
2018	414
2019	264
2020	179
2021	180
2022	180
Thereafter	168
Total	1,385
Less imputed interest	205
Present value of exit cost liabilities	1,180
Existing sublease arrangements	1,400
Impairment charges	326		1,098		935
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension settlement loss	$ 0		$ 24,297		$ 0

[1] Included as a component of operating (gains), losses and other charges, net.