Fair Value Measurements (Details) - Fair Value Measurements - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014	Dec. 25, 2016	Dec. 27, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation - Mutual Funds				$ 9,134	$ 9,043
Contingent Consideration				2,140
Contingent Consideration	$ (1,551)	$ (1,551)			(1,551)
Deferred Compensation - Mutual Funds				9,014
Deferred Compensation - Mutual Funds					8,958
Fair Value, Changes In Liabilities Measured At Level 3 Fair Value Hierarchy [Roll Forward]
Beginning balance	(1,551)
Increase in contingent consideration liability	0	1,551	$ 0
Ending balance		(1,551)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation - Mutual Funds				9,134	9,043
Deferred Compensation - Mutual Funds				9,014
Deferred Compensation - Mutual Funds					8,958
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation - Mutual Funds				0	0
Deferred Compensation - Mutual Funds					0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration				2,140
Contingent Consideration	(1,551)	0	0	$ 2,140	$ (1,551)
Fair Value, Changes In Liabilities Measured At Level 3 Fair Value Hierarchy [Roll Forward]
Beginning balance	(1,551)	0
Increase in contingent consideration liability	3,691	(1,551)
Ending balance	$ 2,140	$ (1,551)	$ 0