Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 27, 2017	Dec. 28, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, net		$ (4,000)
Interest rate swaps		(4,100)
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total, assets		8,074	$ 10,492
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total, assets		12,036	11,248
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total, liabilities		(3,962)	(756)
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total, assets		0	0
Recurring [Member] | Deferred Compensation Plan Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan investments	[1]	$ 12,036	$ 11,248
Valuation technique		market approach	market approach
Recurring [Member] | Deferred Compensation Plan Investments [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan investments	[1]	$ 12,036	$ 11,248
Recurring [Member] | Deferred Compensation Plan Investments [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan investments	[1]	0	0
Recurring [Member] | Deferred Compensation Plan Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan investments	[1]	0	0
Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, net	[2]	$ (3,962)
Interest rate swaps	[2]		$ (756)
Valuation technique		income approach	income approach
Recurring [Member] | Interest Rate Swap [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, net	[2]	$ 0
Interest rate swaps	[2]		$ 0
Recurring [Member] | Interest Rate Swap [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, net	[2]	(3,962)
Interest rate swaps	[2]		(756)
Recurring [Member] | Interest Rate Swap [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps, net	[2]	$ 0
Interest rate swaps	[2]		$ 0
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation technique			market approach
Impairment of assets identified as assets held for sale			$ 1,098
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale	[3]		$ 1,020

[1] The fair values of our deferred compensation plan investments are based on the closing market prices of the elected investments.

[2] The fair values of our interest rate swaps are based upon Level 2 inputs, which include valuation models as reported by our counterparties. The key inputs for the valuation models are quoted market prices, interest rates and forward yield curves. See Note 8 for details on the interest rate swaps.

[3] As of December 28, 2016, assets were classified as assets held for sale and were written down to their fair value. The fair value of assets held for sale was based upon Level 2 inputs, which included sales agreements.